Relic had a few goals in mind when designing this game mode. They wanted it to be easy to play, contain short fun sessions, and have a means to success while playing. You choose between a Space Marine, Eldar Farseer and Ork Mekboy and equip them with wargear that you earn from earning XP from playing The Last Stand. Any mix of heroes may be used while playing, so you can have all space marines if you wish - though the races do compliment each other in some way. There's some time before battle to scope out your friends items and decide on the best strategies. One downside of the mode is you ARE required to have all three player slots filled. If you don't have two other friends to join Games for Windows Live can fill in any vacancies.