Exotic Armada 2 offers some retro-style 2-D spacecraft melee action for 1-4 players (on the same computer). The game isn't even meant to be innovative, rather just offering pure shooting fun in the spirit of games such as Star Control. Build an armada in the ship shop, then go battle it out in a real time combat arena. The teams are fully customisable, even allowing mixed human / AI teams. NOTE: Game requires a display capable of 1280 x 1024.
