As a free-to-play game, the PvP version of the online multiplayer Mech-based battle arena Archangel:Hellfire is an obvious must-have for fans of the mech genre. The co-op version requires the purchase of the Archangel single-player campaign, but that too is a pretty good deal. While the campaign is a rail shooter, which won't please players that prefer to have a bit more control over the path they take, it is quite good too. The co-op battles are a lot of fun, but an inefficient means of setting up the gaming sessions can be burdensome.