What would you recommend for a non-scary shooter?

I want a FPS that is NOT scary. No horror, or sci-fi that is actually scary at the same time, like Area 51, or Half-Life. No zombies. Yet a good game. I know, I know, hard question. I myself am a fan of FPS, but my brother wants to play one that doesn't scare him. I mean, what can you shoot that's not a zombie, a ghost, a mutant, an alien, an in, or a combination of all those? Dunno. But I need a game that does that xD heelp!! =)