Inkwell Knights

4.0

Castle Crashers' knights take on Cuphead's islands, solo or in local co-op.

Brandon TenamJoined October 2026

Multiplayerup to 2 players, in the game's own lobbies

How to join Cuphead has no online play of its own: its co-op is 2 players on one PC. Steam Remote Play Together, started from the Steam overlay, lets a friend join the host's game from theirs.

Play with your friendsSend them the game

About

Bring 31 classic Castle Crashers characters into Cuphead's Inkwell Isles, with their real animations and elemental magic loaded from your own installed copy of Castle Crashers.

Fight with sword combos, shields, long-range projectiles, forward area spells and separate mana for each player. Play solo or with a friend in two-player local co-op on one PC. Choose a different knight for each player through the portrait roster.

Requires installed Windows Steam copies of Cuphead and Castle Crashers. Melty installs the included loader and importer; the first launch prepares a private asset cache. No game artwork is included in the download.

This is an early playable release. Individual character sizing and encounter balance are still being reviewed. Four-player online play, original Castle Crashers progression, grapples and juggles are not included. Paint Junior is not included.

Credits: published through the creator's Melty account, built with Codex assistance. Castle Crashers by The Behemoth; Cuphead by Studio MDHR. Bundled tools credit BepInEx contributors, HarmonyX, MonoMod, Mono.Cecil, Unity Doorstop, the Python Software Foundation, Eclipse Adoptium, JPEXS, Ethan Roseman, Jashandeep Sohi and Pillow contributors. Their licenses and corresponding tool sources accompany the release. Original mod plugin/design code is MIT; the separate GPL importer helper and tools retain their required licenses. Remixes are welcome.