There are four different classes to choose from in the game, and each one provides a different benefit on the battlefield.
Assault Class - Your bog-standard soldier, the Assault Class excels at using standard shotgun and assault rifle weapons in close-quarters combat.
Heavy Class - If you're struggling to take out obstacles and enemy clusters, consider making use of the Heavy Class. Rocket launchers and explosives are the order of the day here.
Sniper Class - If getting up close and personal is causing carnage, make use of the Sniper Class to get an advantage. These ranged experts can deliver blistering firepower from distance - allowing you to take out the enemy and live to fight another turn.
Support Class - The Support Class excels at two things - providing medical aid to injured squad-mates, and offering logistical support to help the team move more stealthily through dangerous environments. Protect these guys at all costs.

Embark on an inspiring mission of human connection beyond the UCA. Sam — with companions by his side — sets out on a new journey to save humanity from extinction. Join them as they traverse a world beset by otherworldly enemies, obstacles and a haunting question: should we have connected?