1.Barotraumagame.com
In Barotrauma you're a submarine crew member beneath the ice of Jupiter's moon Europa. Flee or fight alien lifeforms, explore a strange new world, command your crew, and craft equipment in a tense 2d co-op experience. Command and manage your submarine and its various systems in adrenaline-filled co-operative gameplay: play as the captain or any of the 4 other character classes, with up to 16 players per submarine. Single Player campaign, sandbox mode, and single missions are also available. Coming to Early Access on Steam in early 2019!