Possibly horrible, lol. Nah I passed on Marine Sharpshooter. There was a bunch of them actually, I was possibly going to get Marine Sharpshooter 4, but the screenshots looked really bad, even for 2008, and even for me. There's plenty better (but still horrible) Russian shooters to play ahead of it.
I just tried to play Steam Slug, a German shooter that looks very similar to Painkiller gameplay-wise. Except it's all in steam punk 90s style level design. Couldn't re-map the mouse buttons though, and I don't use wasd.
Looks like I'm playing Dreamkiller next
http://www.gamespot.com/dreamkiller/videos/dreamkiller-alice-trailer-6232743/