It's unusual for bullet heaven games (à la Vampire Survivors) to feature online co-op. That's part of what makes Entropy Survivors, the "bullet heaven roguelike" from First Break Labs, so exciting. Not only does the game have 4-player online co-op, but it has just gotten a Hard mode in celebration of its first anniversary. Now a team of four can face extra-tough challenges together and unlock new skins for their trouble.