Move like V1. Bring the loot home intact.
Loot first. Fight fast. Play inside R.E.P.O. with V1 movement and weapons loaded from your own ULTRAKILL installation. Dash, slide and slam; switch between a revolver with coin ricochets and a shotgun with projectile boosts. Time close-range parries to counter enemy hits. Style refills dash energy and briefly boosts combat. Valuables keep their native physics, damage, value and extraction rules, so protect the haul and holster your gun to carry it. Combat can damage loot; hard impacts can still cause native knockdowns, including during slams.
Experimental development build — multiplayer has not been tested with two players. Solo movement, gun controls and staged combat have been checked in the native game. Experimental private co-op targets the native six-player limit using R.E.P.O.'s Steam/Photon lobbies, with the same mod and both games on every PC. Hosting was tested; joining and replication still need two Steam accounts. Automatic joining is not enabled. The creator's Melty app installation/launch Test passed. Natural AI parry timing and a complete loot-extraction run still need playtests.
Both games required: R.E.P.O. v0.4.4.3 / Steam build 23363152 and ULTRAKILL Steam build 22957324 are the checked installations; other versions are unverified. Melty can install BepInEx 5 automatically. ULTRAKILL assets are read locally and are never included in the package.
Controls: G draw/holster, R weapon swap, LMB fire, RMB toss a revolver coin, F parry or boost a shotgun shot before impact. Dash uses your saved R.E.P.O. Sprint binding; slide/slam uses Crouch. The HUD shows the bindings.
Credits: roryk — concept and gameplay direction; Codex — coding assistance; semiwork — R.E.P.O.; Arsi Hakita Patala, the ULTRAKILL team and New Blood Interactive — locally loaded ULTRAKILL assets; BepInEx/Harmony contributors — loader; rehan-remade/universal-modder — development toolkit.
Original mod code and documentation are MIT licensed; remixes are allowed. Game assets remain subject to their own terms.