For those who were dissapointed that Warhammer 40,000: Space Marine was shipping without co-op ability, we have good news. THQ have announced that the game will be getting DLC, allowing co-op play. Best of all, it's going to be free. It's called 'Exterminatus', and it will provide two co-op scenarios, for up to four players. Alongside the free co-op ability, this will also enable the Leaderboard support and it's expected to be released early October.