This is a nice meaty FPS: minimal on plot, loaded for bear with ridiculous weapons and loads of enemies to mow down. OK, so literally you only get a few weapons in total, but each gun is actually two different weapons creatively combined in a single package. The fun part is that each function of the gun is usually not only completely different but can be combined in creative ways on the fly. The painkiller, your basic weapon for instance, can be used to cut down enemies like a chainsaw at close range, or alternately can shoot a harpoon-like weapon with a laser beam behind it. That means you can shoot the harpoon into enemies, ripping them off their feet, or set it across a tight space and let the beam burn into them as they come at you. OR you can start it spinning chainsaw style, then hit alternate fire, sending a spinning blade off in a strait direction that dices anything in its path.
And that's just one of the weapon. I won't even go into the thing that shoots one foot long wooden stakes, and as a side bonus rapid fire lobs grenades. This leads to a surprising amount of options in combat and you will never find yourself bored with what you're presented with, and wading through waves of demons is always satisfying. That's not even mentioning the gigantic and compelling boss battles, the unlocking tarot card system that can make your bad-ass even bad-asser, or the turning into an unstoppable god/demon bit. Sure you're not going to be moved to tears by the plot, and enemy AI is a bit on the retarded side, but with a name like Painkiller you have to expect that. If you like action, buy this game, period.