diff --git a/configs/nixos/guests/reverse-proxy.nix b/configs/nixos/guests/reverse-proxy.nix
index 10e378e..3ad5fa9 100644
--- a/configs/nixos/guests/reverse-proxy.nix
+++ b/configs/nixos/guests/reverse-proxy.nix
@@ -13,11 +13,6 @@ in
         modules.services.reverse-proxy.enable = true;
 
         services.nginx.virtualHosts = {
-          "games.alexion.dev" = {
-            forceSSL = true;
-            enableACME = true;
-            locations."/".proxyPass = "http://10.23.20.32";
-          };
           "git.alexion.dev" = {
             forceSSL = true;
             enableACME = true;
diff --git a/configs/nixos/guests/romm.nix b/configs/nixos/guests/romm.nix
new file mode 100644
index 0000000..7a05853
--- /dev/null
+++ b/configs/nixos/guests/romm.nix
@@ -0,0 +1,181 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.guests.romm;
+  rommUid = config.registry."stable-uid".${config.networking.hostName}.romm;
+  redisUid = config.registry."stable-uid".${config.networking.hostName}."redis-romm";
+in
+{
+  options.guests.romm = {
+    dataPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/romm";
+      description = "Host path mounted as RomM application data.";
+    };
+
+    postgresqlPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/romm/postgresql";
+      description = "Host path mounted as RomM's PostgreSQL data.";
+    };
+
+    redisPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/romm/redis";
+      description = "Host path mounted as RomM's Redis data.";
+    };
+
+    romsPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/roms";
+      description = "Host path mounted as RomM's ROM library.";
+    };
+
+    biosPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/bios";
+      description = "Host path mounted as RomM's BIOS library.";
+    };
+
+    usersPath = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "/srv/romm/users";
+      description = "Host path mounted as RomM's user assets.";
+    };
+
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions =
+      map
+        (path: {
+          assertion = path.value != null;
+          message = "guests.romm.${path.name} must point at the host directory that stores ${path.description}.";
+        })
+        [
+          {
+            name = "dataPath";
+            value = cfg.dataPath;
+            description = "RomM application data";
+          }
+          {
+            name = "postgresqlPath";
+            value = cfg.postgresqlPath;
+            description = "RomM PostgreSQL data";
+          }
+          {
+            name = "redisPath";
+            value = cfg.redisPath;
+            description = "RomM Redis data";
+          }
+          {
+            name = "romsPath";
+            value = cfg.romsPath;
+            description = "RomM's ROM library";
+          }
+          {
+            name = "biosPath";
+            value = cfg.biosPath;
+            description = "RomM's BIOS library";
+          }
+          {
+            name = "usersPath";
+            value = cfg.usersPath;
+            description = "RomM's user assets";
+          }
+        ];
+
+    guests.romm = {
+      interior = {
+        modules.services.romm.enable = true;
+        services.romm.nginx.virtualHost = cfg.reverseProxy.route.domain;
+      };
+
+      mounts = {
+        "/var/lib/romm" = {
+          directory = cfg.dataPath;
+          owner = rommUid;
+          group = "storage";
+          mode = "2770";
+        };
+        "/var/lib/postgresql" = {
+          directory = cfg.postgresqlPath;
+          owner = config.ids.uids.postgres;
+          group = "storage";
+          mode = "0700";
+        };
+        "/var/lib/redis-romm" = {
+          directory = cfg.redisPath;
+          owner = redisUid;
+          group = "storage";
+          mode = "0700";
+        };
+        "/var/lib/romm/library/roms" = {
+          directory = cfg.romsPath;
+          owner = rommUid;
+          group = "storage";
+          mode = "2770";
+        };
+        "/var/lib/romm/library/bios" = {
+          directory = cfg.biosPath;
+          owner = rommUid;
+          group = "storage";
+          mode = "2770";
+        };
+        "/var/lib/romm/assets/users" = {
+          directory = cfg.usersPath;
+          owner = rommUid;
+          group = "storage";
+          mode = "2770";
+        };
+        "/run/secrets/romm.env" = {
+          file = config.sops.templates."romm.env".path;
+          readOnly = true;
+        };
+      };
+
+      limits = {
+        memory = lib.mkDefault "4G";
+        cpu = lib.mkDefault "200%";
+        tasksMax = lib.mkDefault 512;
+      };
+    };
+
+    sops.secrets =
+      lib.genAttrs
+        [
+          "services/romm/igdb/client-id"
+          "services/romm/igdb/client-secret"
+          "services/romm/retroachievements/api-key"
+          "services/romm/screenscraper/user"
+          "services/romm/screenscraper/password"
+          "services/romm/steamgriddb/api-key"
+        ]
+        (_: {
+          sopsFile = ../secrets + "/${config.networking.hostName}.yaml";
+        });
+
+    sops.templates."romm.env" = {
+      owner = "root";
+      group = "storage";
+      mode = "0440";
+      content = ''
+        IGDB_CLIENT_ID=${config.sops.placeholder."services/romm/igdb/client-id"}
+        IGDB_CLIENT_SECRET=${config.sops.placeholder."services/romm/igdb/client-secret"}
+        SCREENSCRAPER_USER=${config.sops.placeholder."services/romm/screenscraper/user"}
+        SCREENSCRAPER_PASSWORD=${config.sops.placeholder."services/romm/screenscraper/password"}
+        RETROACHIEVEMENTS_API_KEY=${config.sops.placeholder."services/romm/retroachievements/api-key"}
+        STEAMGRIDDB_API_KEY=${config.sops.placeholder."services/romm/steamgriddb/api-key"}
+      '';
+    };
+  };
+}
diff --git a/configs/nixos/hosts/pikachu/default.nix b/configs/nixos/hosts/pikachu/default.nix
index b7bdf4d..9b2c2d3 100644
--- a/configs/nixos/hosts/pikachu/default.nix
+++ b/configs/nixos/hosts/pikachu/default.nix
@@ -88,6 +88,26 @@
     };
   };
 
+  guests.romm = {
+    enable = true;
+    vlan = 20;
+    address = "10.23.20.112";
+    dataPath = "/pikachu/data/romm";
+    postgresqlPath = "/pikachu/data/romm/postgresql";
+    redisPath = "/pikachu/data/romm/redis";
+    romsPath = "/pikachu/media/games/emulation/roms";
+    biosPath = "/pikachu/media/games/emulation/bios";
+    usersPath = "/pikachu/media/games/emulation/users";
+    reverseProxy = {
+      enable = true;
+      route = {
+        domain = "games.alexion.dev";
+        protocol = "https";
+        port = 80;
+      };
+    };
+  };
+
   guests.reverse-proxy = {
     enable = true;
     vlan = 20;
diff --git a/configs/nixos/modules/services/romm.nix b/configs/nixos/modules/services/romm.nix
new file mode 100644
index 0000000..0e0c134
--- /dev/null
+++ b/configs/nixos/modules/services/romm.nix
@@ -0,0 +1,47 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.modules.services.romm;
+in
+{
+  options.modules.services.romm = {
+    enable = lib.mkEnableOption "RomM";
+
+    environmentFile = lib.mkOption {
+      type = lib.types.path;
+      default = "/run/secrets/romm.env";
+      readOnly = true;
+      description = "Path to RomM's environment file.";
+    };
+  };
+
+  config = lib.mkMerge [
+    {
+      registry."stable-uid".${config.networking.hostName} = {
+        romm = 20005;
+        "redis-romm" = 20006;
+      };
+    }
+
+    (lib.mkIf cfg.enable {
+      networking.firewall.allowedTCPPorts = [ 80 ];
+
+      services.romm = {
+        enable = true;
+        group = "storage";
+        database.createLocally = true;
+        redis.createLocally = true;
+        watcher.enable = true;
+        inherit (cfg) environmentFile;
+      };
+
+      users.users = {
+        romm.uid = config.registry."stable-uid".${config.networking.hostName}.romm;
+        redis-romm.uid = config.registry."stable-uid".${config.networking.hostName}."redis-romm";
+      };
+    })
+  ];
+}
diff --git a/configs/nixos/registry/stable-uid.nix b/configs/nixos/registry/stable-uid.nix
index 055bbea..06f821b 100644
--- a/configs/nixos/registry/stable-uid.nix
+++ b/configs/nixos/registry/stable-uid.nix
@@ -12,7 +12,7 @@ let
 
 in
 {
-  # Next stable UID: 20005
+  # Next stable UID: 20007
 
   type = lib.types.ints.positive;
 
diff --git a/configs/nixos/secrets/pikachu.yaml b/configs/nixos/secrets/pikachu.yaml
index a94d646..a2d4ae9 100644
--- a/configs/nixos/secrets/pikachu.yaml
+++ b/configs/nixos/secrets/pikachu.yaml
@@ -6,6 +6,17 @@ services:
         lastfm:
             api-key: ENC[AES256_GCM,data:Zb0I5TpdEqOxLAD6ed2XywFGZp7dfY69vcGiWOUJkJQ=,iv:pO53pHr09jWfzJyTsQbTHtzTmiQ9+RQkDwZJmInIiX8=,tag:io9jkSN7TF2I8+qlSymaYw==,type:str]
             secret: ENC[AES256_GCM,data:rKhd9i0/tbJlXhc9Wf81IDydjpD8khSdwJEEMK260E4=,iv:btBXWBKJp9br5a3yZsRVegN8Ytzc45Qbk2iNlPbENkQ=,tag:LUbu+6gxfqQvVpddZto7Tg==,type:str]
+    romm:
+        igdb:
+            client-id: ENC[AES256_GCM,data:tme7NzzbOlCmkMwVObWz793mOsCyVIzSjGoFvxpe,iv:5aOMvsDi8Z9aBymbqhbK79X4kJsqaET1y2Py6YUZZ/U=,tag:ih3GghlxiLsVyeTJoqU9/Q==,type:str]
+            client-secret: ENC[AES256_GCM,data:AqF7B9VaxM/X3sRqY6C5JVWPWqgRIoqy09P9ZUFj,iv:D+vDPUuGGdzKYnTVTRkI9TV/EOJgVECIeNDt9g8NGl0=,tag:MRaTT7TdEZSd+98xthVw1A==,type:str]
+        retroachievements:
+            api-key: ENC[AES256_GCM,data:LMzETQCMi9Ib783W0BZDe2PaSUSTVM5a61502RtZLg8=,iv:Hf5nBoVtZdJszQuc2n0LVNMtJCCpJrh40y4g+l+az70=,tag:esfKLpI1W8BG3Pfsg3xxKQ==,type:str]
+        steamgriddb:
+            api-key: ENC[AES256_GCM,data:+kBRieIB/dHbvQLbH2gQTQh2j6DQhybVWEGkSCRZrZY=,iv:3h6dhfiV7HfaZhMv93x8+7F3utzYG6fIbTDScA14PVI=,tag:Wo24YnvsIxe7iMRLyxrj2w==,type:str]
+        screenscraper:
+            user: ENC[AES256_GCM,data:7hGcFF4xqg==,iv:SFOdYej94Thfn+Te0kXsC9Kq568A1dsnaR+JB90MgBQ=,tag:inIWuFY7f5Tvv8EyV71dYA==,type:str]
+            password: ENC[AES256_GCM,data:eUWwDDQUSytm/6QZlG5XjbSi41nsBQbm4w==,iv:82S2a3rAVjaF0CXcjXUXErNHMY7MEkjpDL7EVX9cIHw=,tag:uGuVJCv8ThsaNnA0C0WR2Q==,type:str]
 sops:
     age:
         - enc: |
@@ -26,7 +37,7 @@ sops:
             dyjzy0/9Ui1IIXH36AImO5hiEZcrGePV2qPLLQc7ZLngC1jlJuEKJA==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1wf5s0n0tgt6ld2ysgu9dc67mj8ylwecgl4utzg7hqwy3kut9zyms7aglmh
-    lastmodified: "2026-09-12T22:54:25Z"
-    mac: ENC[AES256_GCM,data:4R3a0ytf4i8aM8iBQ9vRC/q+hvtjLrCTNgbpCB5DbqBMBYmhtGsBmO/0i1yT0N4tydyLaGOMkNfuuuVi3ASLEOKnViy9w3uD9IN0F79W4f2vguWUVIp/T8skvN9wbV9o9xd0LkJzmeVVgzb1H6HKw+rTGjbquleoIHEBDcDDM+k=,iv:0NlckMXlS+idY6UGBF+F0KFLt+pzD7Q/YEQOdXraAYg=,tag:JBBQduV8uhnKz9gPf6HfAQ==,type:str]
+    lastmodified: "2026-10-20T01:27:06Z"
+    mac: ENC[AES256_GCM,data:NCt6e/ctZwaBADfrhu1RXtILlClbHEqOAnIu8rE/zMPSwMIPB/kTtfd/ujf+1iRszoHaX4Se1xc0wz1th6NVToFVNarxBBgTk4JMUU8gdMweOjmwlh3GXU3ZcYY/xAXxWF1hxyXSEW78j3S2844H9XXENAq/Bf3mjdCYQ/qr/d4=,iv:4nFyBSmRvF4zSAwvL+xccMwtWrVbHtFKNoTb7f3rSH4=,tag:eCV/7P0TjyMZXKcWBUPXQA==,type:str]
     unencrypted_suffix: _unencrypted
     version: 3.13.3