It's a game based on the Quake 3 engine, but it's totally different from Quake 3. It's a WWII themed FPS game, but it's not as realistic as say CoD. It has realistic textures, but the movements are Quake 3 style and it's also very fast paced like Quake 3. It's one of the best game out there in my opinion. The combination of a realistic theme with an unrealistic gameplay is just awesome. Try it out for yourself, you'll get hooked.