“Exploring caves is fun in co-op; games like Spelunker HD Deluxe are proof of that. There’s more than one way to delve a cave, though. Brave Cave from new indie developer Hit Start Studio is an upcoming puzzle platformer with a Chariot-like emphasis on co-op. It will support both local and online co-op for two players, so everybody will have a chance to cooperate their way through the brave and dangerous caves with a friend,” says Co-Optimus.
Source: N4G PC Brave Cave Is a Co-op Platformer That's Coming to Steam This Year