diff --git a/nix/configuration/configuration.nix b/nix/configuration/configuration.nix
index f621663..a18d814 100644
--- a/nix/configuration/configuration.nix
+++ b/nix/configuration/configuration.nix
@@ -32,6 +32,7 @@
     ./roles/graphics
     ./roles/hydra
     ./roles/iso
+    ./roles/iso_mount
     ./roles/kanshi
     ./roles/kodi
     ./roles/kubernetes
@@ -49,6 +50,7 @@
     ./roles/python
     ./roles/qemu
     ./roles/reset
+    ./roles/rpcs3
     ./roles/rust
     ./roles/shikane
     ./roles/shipwright
diff --git a/nix/configuration/hosts/odo/default.nix b/nix/configuration/hosts/odo/default.nix
index d5042f7..11be98b 100644
--- a/nix/configuration/hosts/odo/default.nix
+++ b/nix/configuration/hosts/odo/default.nix
@@ -75,6 +75,7 @@
   me.gpg.enable = true;
   me.graphical = true;
   me.graphics_card_type = "amd";
+  me.iso_mount.enable = true;
   me.kanshi.enable = false;
   me.kubernetes.enable = true;
   me.latex.enable = true;
@@ -85,6 +86,7 @@
   me.pcsx2.enable = true;
   me.python.enable = true;
   me.qemu.enable = true;
+  me.rpcs3.enable = true;
   me.rust.enable = true;
   me.shikane.enable = true;
   me.sops.enable = true;
diff --git a/nix/configuration/hosts/quark/default.nix b/nix/configuration/hosts/quark/default.nix
index 317912d..672428a 100644
--- a/nix/configuration/hosts/quark/default.nix
+++ b/nix/configuration/hosts/quark/default.nix
@@ -13,94 +13,101 @@
     ./wifi.nix
   ];
 
-  # Generate with `head -c4 /dev/urandom | od -A none -t x4`
-  networking.hostId = "47ee7d7c";
+  config = {
+    # Generate with `head -c4 /dev/urandom | od -A none -t x4`
+    networking.hostId = "47ee7d7c";
 
-  networking.hostName = "quark"; # Define your hostname.
+    networking.hostName = "quark"; # Define your hostname.
 
-  time.timeZone = "America/New_York";
-  i18n.defaultLocale = "en_US.UTF-8";
+    time.timeZone = "America/New_York";
+    i18n.defaultLocale = "en_US.UTF-8";
 
-  me.secureBoot.enable = true;
+    me.secureBoot.enable = true;
 
-  me.optimizations = {
-    enable = true;
-    arch = "znver5";
-    system_features = [
-      "gccarch-znver4"
-      "gccarch-znver5"
-      "gccarch-skylake"
-      # "gccarch-alderlake" missing WAITPKG
-      "gccarch-x86-64-v3"
-      "gccarch-x86-64-v4"
-      "benchmark"
-      "big-parallel"
-      "kvm"
-      "nixos-test"
+    me.optimizations = {
+      enable = true;
+      arch = "znver5";
+      system_features = [
+        "gccarch-znver4"
+        "gccarch-znver5"
+        "gccarch-skylake"
+        # "gccarch-alderlake" missing WAITPKG
+        "gccarch-x86-64-v3"
+        "gccarch-x86-64-v4"
+        "benchmark"
+        "big-parallel"
+        "kvm"
+        "nixos-test"
+      ];
+    };
+
+    # Early KMS
+    boot.initrd.kernelModules = [ "amdgpu" ];
+
+    # Mount tmpfs at /tmp
+    boot.tmp.useTmpfs = true;
+
+    # Enable TRIM
+    # services.fstrim.enable = lib.mkDefault true;
+
+    # RPCS3 has difficulty with znver5
+    me.rpcs3.config.Core."Use LLVM CPU" = "znver4";
+
+    me.alacritty.enable = true;
+    me.ansible.enable = true;
+    me.ares.enable = true;
+    me.bluetooth.enable = true;
+    me.chromecast.enable = true;
+    me.chromium.enable = true;
+    me.docker.enable = true;
+    me.ecc.enable = true;
+    me.emacs_flavor = "full";
+    me.firefox.enable = true;
+    me.flux.enable = true;
+    me.gcloud.enable = true;
+    me.git.config = ../../roles/git/files/gitconfig_home;
+    me.gnuplot.enable = true;
+    me.gpg.enable = true;
+    me.graphical = true;
+    me.graphics_card_type = "amd";
+    me.iso_mount.enable = true;
+    me.kanshi.enable = false;
+    me.kubernetes.enable = true;
+    me.latex.enable = true;
+    me.launch_keyboard.enable = true;
+    me.lvfs.enable = true;
+    me.media.enable = true;
+    me.nix_index.enable = true;
+    me.nix_worker.enable = true;
+    me.pcsx2.enable = true;
+    me.python.enable = true;
+    me.qemu.enable = true;
+    me.rpcs3.enable = true;
+    me.rust.enable = true;
+    me.shikane.enable = true;
+    me.sops.enable = true;
+    me.sound.enable = true;
+    me.steam.enable = true;
+    me.steam_run_free.enable = true;
+    me.sway.enable = true;
+    me.tekton.enable = true;
+    me.terraform.enable = true;
+    me.thunderbolt.enable = true;
+    me.vnc_client.enable = true;
+    me.vscode.enable = true;
+    me.wasm.enable = true;
+    me.waybar.enable = true;
+    me.wireguard.activated = [
+      "drmario"
+      "wgh"
+      "colo"
     ];
+    me.wireguard.deactivated = [ "wgf" ];
+    me.zrepl.enable = true;
+    me.zsh.enable = true;
+
+    me.sm64ex.enable = true;
+    me.shipwright.enable = true;
+    me.ship2harkinian.enable = true;
   };
-
-  # Early KMS
-  boot.initrd.kernelModules = [ "amdgpu" ];
-
-  # Mount tmpfs at /tmp
-  boot.tmp.useTmpfs = true;
-
-  # Enable TRIM
-  # services.fstrim.enable = lib.mkDefault true;
-
-  me.alacritty.enable = true;
-  me.ansible.enable = true;
-  me.ares.enable = true;
-  me.bluetooth.enable = true;
-  me.chromecast.enable = true;
-  me.chromium.enable = true;
-  me.docker.enable = true;
-  me.ecc.enable = true;
-  me.emacs_flavor = "full";
-  me.firefox.enable = true;
-  me.flux.enable = true;
-  me.gcloud.enable = true;
-  me.git.config = ../../roles/git/files/gitconfig_home;
-  me.gnuplot.enable = true;
-  me.gpg.enable = true;
-  me.graphical = true;
-  me.graphics_card_type = "amd";
-  me.kanshi.enable = false;
-  me.kubernetes.enable = true;
-  me.latex.enable = true;
-  me.launch_keyboard.enable = true;
-  me.lvfs.enable = true;
-  me.media.enable = true;
-  me.nix_index.enable = true;
-  me.nix_worker.enable = true;
-  me.pcsx2.enable = true;
-  me.python.enable = true;
-  me.qemu.enable = true;
-  me.rust.enable = true;
-  me.shikane.enable = true;
-  me.sops.enable = true;
-  me.sound.enable = true;
-  me.steam.enable = true;
-  me.steam_run_free.enable = true;
-  me.sway.enable = true;
-  me.tekton.enable = true;
-  me.terraform.enable = true;
-  me.thunderbolt.enable = true;
-  me.vnc_client.enable = true;
-  me.vscode.enable = true;
-  me.wasm.enable = true;
-  me.waybar.enable = true;
-  me.wireguard.activated = [
-    "drmario"
-    "wgh"
-    "colo"
-  ];
-  me.wireguard.deactivated = [ "wgf" ];
-  me.zrepl.enable = true;
-  me.zsh.enable = true;
-
-  me.sm64ex.enable = true;
-  me.shipwright.enable = true;
-  me.ship2harkinian.enable = true;
 }
diff --git a/nix/configuration/roles/iso_mount/default.nix b/nix/configuration/roles/iso_mount/default.nix
new file mode 100644
index 0000000..32c0af6
--- /dev/null
+++ b/nix/configuration/roles/iso_mount/default.nix
@@ -0,0 +1,45 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  iso_mount =
+    (pkgs.writeScriptBin "iso_mount" (builtins.readFile ./files/iso_mount.bash)).overrideAttrs
+      (old: {
+        buildCommand = "${old.buildCommand}\n patchShebangs $out";
+
+      });
+  iso_unmount =
+    (pkgs.writeScriptBin "iso_unmount" (builtins.readFile ./files/iso_unmount.bash)).overrideAttrs
+      (old: {
+        buildCommand = "${old.buildCommand}\n patchShebangs $out";
+
+      });
+
+in
+{
+  imports = [ ];
+
+  options.me = {
+    iso_mount.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install iso_mount.";
+    };
+  };
+
+  config = lib.mkIf config.me.iso_mount.enable (
+    lib.mkMerge [
+      {
+        environment.systemPackages = [
+          iso_mount
+          iso_unmount
+        ];
+      }
+    ]
+  );
+}
diff --git a/nix/configuration/roles/iso_mount/files/iso_mount.bash b/nix/configuration/roles/iso_mount/files/iso_mount.bash
new file mode 100644
index 0000000..143e14d
--- /dev/null
+++ b/nix/configuration/roles/iso_mount/files/iso_mount.bash
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+#
+# Mount a full-disk image as a loopback device so you can mount individual partitions from inside of it.
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+exec udisksctl loop-setup -r -f "${@}"
diff --git a/nix/configuration/roles/iso_mount/files/iso_unmount.bash b/nix/configuration/roles/iso_mount/files/iso_unmount.bash
new file mode 100644
index 0000000..1771e21
--- /dev/null
+++ b/nix/configuration/roles/iso_mount/files/iso_unmount.bash
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+#
+# Mount a full-disk image as a loopback device so you can mount individual partitions from inside of it.
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+exec udisksctl loop-delete "${@}"
diff --git a/nix/configuration/roles/rpcs3/default.nix b/nix/configuration/roles/rpcs3/default.nix
new file mode 100644
index 0000000..f034f6d
--- /dev/null
+++ b/nix/configuration/roles/rpcs3/default.nix
@@ -0,0 +1,170 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  rpcs3_config_yaml = settingsFormat.generate "config.yml" config.me.rpcs3.config;
+  settingsFormat = pkgs.formats.yaml { };
+in
+{
+  imports = [ ];
+
+  options.me = {
+    rpcs3.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      example = true;
+      description = "Whether we want to install rpcs3.";
+    };
+
+    rpcs3.config = lib.mkOption rec {
+      apply = lib.recursiveUpdate default;
+      inherit (settingsFormat) type;
+      default = {
+        Core = {
+          "Use LLVM CPU" = lib.mkIf (config.me.optimizations.enable) config.me.optimizations.arch;
+        };
+        VFS = {
+          "Enable /host_root/" = false;
+        };
+        Video = {
+          "Write Color Buffers" = true;
+          VSync = true;
+          "Performance Overlay" = {
+            Enabled = false;
+          };
+        };
+        Miscellaneous = {
+          "Pause emulation on RPCS3 focus loss" = true;
+          "Start games in fullscreen mode" = true;
+          "Pause Emulation During Home Menu" = false; # true makes the home menu slow
+        };
+      };
+      example = null;
+      description = "RPCS3's config.yml in nix form.";
+    };
+  };
+
+  config = lib.mkIf config.me.rpcs3.enable (
+    lib.mkMerge [
+      (lib.mkIf config.me.graphical {
+        environment.systemPackages = with pkgs; [
+          rpcs3
+        ];
+
+        security.pam.loginLimits = [
+          {
+            domain = "@wheel";
+            item = "memlock";
+            type = "hard";
+            value = "unlimited";
+          }
+          {
+            domain = "@wheel";
+            item = "memlock";
+            type = "soft";
+            value = "unlimited";
+          }
+        ];
+
+        home-manager.users.talexander =
+          { pkgs, ... }:
+          {
+            home.file.".config/rpcs3/config.yml" = lib.mkIf (config.me.rpcs3.config != null) {
+              source = rpcs3_config_yaml;
+            };
+            home.file.".config/rpcs3/GuiConfigs/CurrentSettings.ini" = {
+              source = ./files/CurrentSettings.ini;
+            };
+          };
+
+        environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {
+          hideMounts = true;
+          users.talexander = {
+            directories = [
+              {
+                # Location of ROMs.
+                directory = ".config/rpcs3/games";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                directory = ".config/rpcs3/dev_hdd0";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                directory = ".config/rpcs3/dev_hdd1";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                directory = ".config/rpcs3/savestates";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                directory = ".config/rpcs3/dev_usb000";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                # Seems to be where the firmware is installed.
+                directory = ".config/rpcs3/dev_flash";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                # Controller config.
+                directory = ".config/rpcs3/input_configs";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+              {
+                # Game icons.
+                directory = ".config/rpcs3/Icons";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+            ];
+            files = [
+              {
+                # play times and recently played
+                file = ".config/rpcs3/GuiConfigs/persistent_settings.dat";
+                parentDirectory = {
+                  mode = "0755";
+                };
+              }
+            ];
+          };
+        };
+
+        environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
+          hideMounts = true;
+          users.talexander = {
+            directories = [
+              {
+                # Game saves
+                directory = ".cache/rpcs3";
+                user = "talexander";
+                group = "talexander";
+                mode = "0755";
+              }
+            ];
+          };
+        };
+      })
+    ]
+  );
+}
diff --git a/nix/configuration/roles/rpcs3/files/CurrentSettings.ini b/nix/configuration/roles/rpcs3/files/CurrentSettings.ini
new file mode 100644
index 0000000..b6354c4
--- /dev/null
+++ b/nix/configuration/roles/rpcs3/files/CurrentSettings.ini
@@ -0,0 +1,5 @@
+[Meta]
+currentStylesheet=Darker Style by TheMitoSan
+
+[main_window]
+infoBoxEnabledWelcome=false
diff --git a/nix/steam_deck/configuration/roles/rpcs3/default.nix b/nix/steam_deck/configuration/roles/rpcs3/default.nix
index dc944ab..8ca37dc 100644
--- a/nix/steam_deck/configuration/roles/rpcs3/default.nix
+++ b/nix/steam_deck/configuration/roles/rpcs3/default.nix
@@ -10,6 +10,9 @@ let
     export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pkgs.libglvnd}/lib"
     exec ${pkgs.rpcs3}/bin/rpcs3 "''${@}"
   '';
+  rpcs3_config_yaml = settingsFormat.generate "config.yml" config.me.rpcs3.config;
+  settingsFormat = pkgs.formats.yaml { };
+
 in
 {
   imports = [ ];
@@ -21,6 +24,33 @@ in
       example = true;
       description = "Whether we want to install rpcs3.";
     };
+
+    rpcs3.config = lib.mkOption rec {
+      apply = lib.recursiveUpdate default;
+      inherit (settingsFormat) type;
+      default = {
+        Core = {
+          "Use LLVM CPU" = "znver2";
+        };
+        VFS = {
+          "Enable /host_root/" = false;
+        };
+        Video = {
+          "Write Color Buffers" = true;
+          VSync = true;
+          "Performance Overlay" = {
+            Enabled = false;
+          };
+        };
+        Miscellaneous = {
+          "Pause emulation on RPCS3 focus loss" = true;
+          "Start games in fullscreen mode" = true;
+          "Pause Emulation During Home Menu" = false; # true makes the home menu slow
+        };
+      };
+      example = null;
+      description = "RPCS3's config.yml in nix form.";
+    };
   };
 
   config = lib.mkIf config.me.rpcs3.enable (
@@ -31,15 +61,25 @@ in
           steam_rpcs3
         ];
 
-        # .config/rpcs3/config.yml
-        # .config/rpcs3/GuiConfigs/CurrentSettings.ini
+        home.file.".config/rpcs3/config.yml" = lib.mkIf (config.me.rpcs3.config != null) {
+          source = rpcs3_config_yaml;
+        };
+        home.file.".config/rpcs3/GuiConfigs/CurrentSettings.ini" = {
+          source = ./files/CurrentSettings.ini;
+        };
 
         me.persist.directories = [
+          ".config/rpcs3/games" # Location of ROMs.
           ".config/rpcs3/dev_hdd0"
           ".config/rpcs3/dev_hdd1"
           ".config/rpcs3/savestates"
           ".config/rpcs3/dev_usb000"
           ".config/rpcs3/dev_flash" # Seems to be where the firmware is installed.
+          ".config/rpcs3/input_configs" # Controller config.
+          ".config/rpcs3/Icons" # Game icons.
+        ];
+        me.persist.files = [
+          ".config/rpcs3/GuiConfigs/persistent_settings.dat" # play times and recently played
         ];
         me.state.directories = [ ".cache/rpcs3" ];
 
diff --git a/nix/steam_deck/configuration/roles/rpcs3/files/CurrentSettings.ini b/nix/steam_deck/configuration/roles/rpcs3/files/CurrentSettings.ini
new file mode 100644
index 0000000..b6354c4
--- /dev/null
+++ b/nix/steam_deck/configuration/roles/rpcs3/files/CurrentSettings.ini
@@ -0,0 +1,5 @@
+[Meta]
+currentStylesheet=Darker Style by TheMitoSan
+
+[main_window]
+infoBoxEnabledWelcome=false
diff --git a/nix/steam_deck/configuration/roles/steam_rom_manager/default.nix b/nix/steam_deck/configuration/roles/steam_rom_manager/default.nix
index 082781f..864ffdd 100644
--- a/nix/steam_deck/configuration/roles/steam_rom_manager/default.nix
+++ b/nix/steam_deck/configuration/roles/steam_rom_manager/default.nix
@@ -24,21 +24,12 @@ in
   config = lib.mkIf config.me.steam_rom_manager.enable (
     lib.mkMerge [
       (lib.mkIf config.me.graphical {
-        home.packages = with pkgs; [
+        home.packages = [
           package
         ];
 
         me.persist.directories = [ ".config/steam-rom-manager/userData" ];
 
-        home.persistence."/home/deck/.persist" = {
-          directories = [
-            {
-              directory = ".config/steam-rom-manager/userData";
-              method = "symlink";
-            }
-          ];
-        };
-
         # TODO: Install a fully configured /home/deck/.persist/.config/steam-rom-manager/userData/userConfigurations.json (which contains the parser definitions) and /home/deck/.persist/.config/steam-rom-manager/userData/userSettings.json (which contains the applications settings like steam directory).
         # TODO: Maybe only persist /home/deck/.persist/.config/steam-rom-manager/userData/artworkBackups and /home/deck/.persist/.config/steam-rom-manager/userData/artworkCache.json after the parser config is being installed.
 
diff --git a/nix/steam_deck/configuration/util/persist_symlink/default.nix b/nix/steam_deck/configuration/util/persist_symlink/default.nix
index 0860d66..6339bab 100644
--- a/nix/steam_deck/configuration/util/persist_symlink/default.nix
+++ b/nix/steam_deck/configuration/util/persist_symlink/default.nix
@@ -16,6 +16,12 @@
       example = [ ".local/share/dolphin-emu/Wii" ];
       description = "List of folders relative to the home directory to persist.";
     };
+    persist.files = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      example = [ ".local/share/foo.sqlite3" ];
+      description = "List of files relative to the home directory to persist.";
+    };
     state.directories = lib.mkOption {
       type = lib.types.listOf lib.types.str;
       default = [ ];
@@ -50,6 +56,11 @@
         );
       };
     })
+    (lib.mkIf (config.me.persist.files != [ ]) {
+      home.persistence."/home/deck/.persist" = {
+        files = config.me.persist.files;
+      };
+    })
     (lib.mkIf (config.me.state.directories != [ ]) {
       home.persistence."/home/deck/.state" = {
         directories = (