Dark Sector.
A surprisingly decent game, the shooting mechanics are very similar to Gears of War, though the glaive adds a nice little touch, it took me a while to figure how to properly use it as it has a shorter range than expected and controlling it using after-touch can be hard sometimes, but being able to use it to take down enemies behind cover is pretty fun. Having to buy weapons is kind of annoying, specially as many of them are rather expensive, so I ended up looking up which were the best and went with those, glad I did, as some enemies can be bullet spongy as hell. Mutants were specially annoying, since they deal a ton of damage, can grab you, which, even if you shake them off still leaves you open for a bit, and some also like to jump around all over the place and/or become invisible for short periods of time.
Bosses were... there I guess, all of them have some weakness related to the glaive that you can use, but they're also killable by just emptying everything you have on them, except for the last two which do require the glaive to kill them, pretty much impossible to do so without it. Not much more to say, boss fights weren't great, but they also didn't suck, their main purpose is just to give you new powers.
The story was also lacking, there's some interesting stuff there, but it doesn't tell you enough about anything to make you care, it's basically "something something virus, something mutants, something something dark/tragic past, who cares".
Overall, the thing that elevates this from forgettable bargain bin game to something that was actually enjoyable is the glaive and all related powers.