Theory
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About Theory
Theory is a first-person shooter set in a post-apocalyptic world overrun by zombies. You play as Elif, who leaves her farm in a car with hunting weapons to find her husband, Ali, and their sick child, Vefa, after they fail to return from a trip to the hospital. Her journey takes her through mountains, decaying cities and rural landscapes filled with threats.
Elif’s story
Elif and Ali left city life to settle on a farm. After many years there, Elif wrote and published a book arguing that people could live prosperous, comfortable lives away from mechanized modernism. Its ideas spread among the public, but city administrators opposed them and declared Elif persona non grata.
After Vefa falls ill, Ali takes the child to the hospital. When neither has returned after several days, Elif sets out to find them. The journey brings her various difficulties and adventures as she tries to get back to her family.
Combat and exploration
You face constant zombie threats and use handguns, rifles and shotguns to defend yourself. The game also includes car driving, a hand lamp, interactions and books. Objects help tell the story.
Frequently asked questions
Yes. Theory is free to play on Steam, so there is nothing to buy to start playing.
The minimum requirements for Theory are: GeForce GTX 950, 16 GB RAM, 5 GB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. Theory is a single-player game.
No. Valve rates Theory as Unsupported on the Steam Deck.
Yes. Theory is the full base game. You need nothing else to play it.











