Warhammer 40,000: Fireteam

From BoardGameGeek:

Responding to an urgent distress call, Squad Gideon has made planetfall in the distant Bakhar Sector. The worst fears of these five Assault Intercessors of the legendary Ultramarines Chapter are rapidly confirmed: the planet, Zanzamon, is an ancient tomb world belonging to Necrons of the infamous Szarkhan Dynasty – and its malevolent denizens are rapidly beginning to stir. Now, behind enemy lines and without backup, Sergeant Gideon and his men must fight their way through the hordes of awakening Necron Warriors who stand in their way, and put a stop to the Szarkhans' nefarious plans. -description from the publisher