Co-Optimus says: “Alongside the free ‘Left 4 Dead Character Pack 2’ that released this week, co-op horror shooter Zombie Army 4 also received a new premium DLC mission. ‘Return to Hell’ is the finale of the Season Three storyline, taking the fight against evil directly into Hell itself. The new mission really showcases how tense and creepy this game can be, featuring a scenario straight out of Hellboy and lots of fearsome scenarios for players to overcome.”
Source: N4G PC Zombie Army 4 'Return to Hell' DLC Co-Op Impressions [Co-Optimus]