Choose your gear, then kick the doors down and face the action. Adapt and react by the seat of your pants, and if needed - restart without a care and rethink. Master weapons recoil and time your reloads, use distance and cover to your advantage and use the in-game Strategic Abilities to decide for yourself when healthpacks or gear refills are needed, or if that team-mate of yours is worth saving. Or just save up the Points earned and unleash your Ultimate to waltz through that tricky final room.And when it gets too hard, bring over a friend to help. Quick Points High detail retro graphics 6 playable characters, each with unique gameplay and level up options Unique in-game Strategic Abilities system 84 non linear levels to complete 60 weapons and gear items 20+ enemy types and 4 mission objectives Zombie invasion mode allowing you to play the game again in a new way Couch and Online Cooperative Multiplayer System Requirements MINIMUM: OS: Windows Vista Processor: 1 GHz Memory: 512 MB RAM Graphics: 3D Accelerated 128MB Graphics Card DirectX: Version 9.0c Storage: 100 MB available space Sound Card: Yes RECOMMENDED: OS: Windows 7 Processor: 2 GHz Memory: 1 GB RAM Graphics: 3D Accelerated 512MB Graphics Card DirectX: Version 9.0c Storage: 100 MB available space Sound Card: Yes