Rather than having a linear plot (as with Shadow of Chernobyl), the story focuses on an AI-driven faction war, where groups are fighting to gain control of new areas formed by a landscape-reforming blowout. Territorial wars, territory capture, and fan-created missions will be included.
You can join one of eight factions and lead them to victory. Confirmed factions that are joinable are the Bandits, Duty, Freedom, Clear Sky and Final Day. Other factions included will be the Loners and the Ukrainian Military.
Beside the use of grenades, NPCs have become much more intelligent; they coordinate and work very well in groups, interact in groups, and with the player. At the Igromir gameshow, no one (including the developers) were able to kill more than two of four bandits armed with AKsu's and Sawn-Off Shotguns before dying.
The AI now has day and night routines. Since smart terrain for the AI has been expanded, now the world can be physically interacted with.