HammerwatchArchipelago randomizer mod

Playing with others

Solo or native co-op. Every player in the same Hammerwatch game must connect to the same Archipelago slot, using compatible mods; the party shares one world's progression. Separate Hammerwatch worlds use separate slots. Multiworld participants can play together or return at different times while their server remains available.

Known scope and limitations

• Use the original Hammerwatch, not Hammerwatch II or Hammerwatch Anniversary Edition. This review covers the Windows Steam installer route; base-game Linux or macOS availability does not establish support for this mod.
• Install APWorld 4.1.4 and the separate HammerwatchAP-v2.0.2.zip game mod. The World declares Archipelago 0.6.4 or newer and the 2.0 client line. Keep the paired files together and do not mix builds when continuing a generated room.
• Back up the game and saves. Extract the mod into its own clean folder outside the game directory, keep all supplied files together, run HammerwatchAPModInstaller.exe and select Hammerwatch.exe. The installer copies its folder contents and replaces mod asset/library folders.
• The installer patches SDL2-CS.dll and retains SDL2-CS_original.dll. Avoid overlapping mods. Run the installed APModUninstall.bat from the game directory only; it operates on relative paths.
• Connect through Archipelago on the main menu and check the displayed room and slot. Resume the matching save. If a server port changes, connect to the new address before loading the existing save, following the setup guide.
• AP saves contain the room password. Keep saves private and redact diagnostics. An explicit wss:// server address prevents the bundled network library from falling back to unencrypted WS; the bare-host connection route can use that fallback.
• The code retains checks for reconnection, but receipt ordering and save identity checks have limitations. Avoid switching rooms or slots with an active save, keep backups and confirm important received items after interruptions.
• A saved completed goal can be resent when loading the save, but ordinary reconnect does not retry that status by itself. Confirm that the server records your finish, especially if the connection drops near completion.
• TrapLink now interprets more foreign traps, including screen curvature and CRT effects. Those display changes have no automatic restoration timer in the reviewed handlers; leave TrapLink disabled if you want to avoid them.
• The World includes meaningful game-specific tests, which were inspected rather than run. Complete installer reconstruction, tracker/asset provenance and retail-version coverage remain incomplete; no completed campaign or crash-free runtime is claimed.