Steredenn: Binary Stars (2016)

Two ships carry four weapons between them but share one life bar. That makes a partner's risky close-range drill or sword a decision for both people, rather than a private experiment. Different ships and pickups let you plan complementary coverage across the changing encounters. Use the current Binary Stars version on PC for this local co-op mode. Expect a demanding roguelike run, not a guaranteed easier clear: the shared health can punish uneven abilities, so talk about weapon choices and how much damage the team can afford.