With Cataclysm Dark Days Ahead & BN version you finally can have both games in a single app and try them before buying, and if you like it, unlock full version. You don't need to pay until you played the game.

Cataclysm: Dark days ahead and Cataclysm: Bright Nights are turn-based survival games set in a post-apocalyptic world. Struggle to survive in a harsh, persistent, procedurally generated world. Scavenge the remnants of a dead civilization for food, equipment, or, if you are lucky, a vehicle with a full tank of gas to get you the hell out of Dodge. Fight to defeat or escape from a wide variety of powerful monstrosities, from zombies to giant insects to killer robots and things far stranger and deadlier, and against the others like yourself, that want what you have…

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