Krater takes place in a lush post-apocalyptic game world, a gigantic impact crater where cities and even nations have has been built on the aftermath of a bomb. It combines the combat mechanics of action-RPGs with the top-down tactics of the classic old-school games such as Syndicate and X-COM.

One of your main goal as a player is to build your team and and try to get as deep as you can into the underside of the Krater. This will eventually become a dungeon crawler with an almost indefinite number of levels.