Barony, with the crabs moved in. You dive Barony's dungeon as usual, but Crab Champions comes along. Its music, sounds, relic names and icons are read straight from your own copy of Crab Champions.
What you get
Crab soundtrack: 30 Crab Champions tracks replace Barony's title, region, shop and minotaur music. That means beach funk in the Mines, cave songs in the Caves, and Tony's loop in every shop.
Crab sounds: item and gold pickups, level up, death and the gauntlet gates all use Crab Champions sounds.
Crab relics: all of Barony's rings and amulets become Crab Champions relics and perks, with their Crab names, rarity and icons. Examples: Ring Of Power (might), Ring Of Defense (protection), Ring Of Healing (regeneration), Grave Dodger (life saving), Ring Of Rocket Jumping (levitation), and Slippery Slope (strangulation, still cursed). Each keeps the Barony effect that matches it. Unidentified, they show their Crab rarity.
Crab Gauntlet rooms: a wave arena joins every region's room pool, Mines to Citadel, built from that region's own walls. Step in and the gates slam shut. Three waves of Barony monsters pour in. Then the gates lift and a vault opens on two random relic rings and a relic amulet.
Co-op for up to 4 players: the host picks Host LAN Party, and Melty shows friends the host's address. They open Lobby Browser > LAN > Enter IP Address, paste it, and press Connect. Barony's own online lobbies work too.
You need
Barony (Steam). This is the game you play.
Crab Champions (Steam), installed. Nothing from either game is included in the download.
Changed item and room files turn off Steam achievements in Barony, as with any Barony mod.