From the manufacturer
You are at the centre of a war against the ridden. These once-human hosts of a deadly Parasite have turned into terrifying creatures bent on devouring what remains of civilization. With humanity's extinction on the line, it's up to you and your friends to take the fight to the enemy, eradicate the ridden, and reclaim the world. Fight your way through a 4-player co-op story campaign where you must work together to survive increasingly challenging missions. Play with up to 3 of your friends online or go solo and lead your team in battle. Choose from 8 customizable cleaners and a range of lethal weapons and items to strategize against an ever-evolving enemy. Play with or against friends in PVP. Become a cleaner or switch sides and play as the horrific ridden. Both sides come with unique weapons, abilities and perks.