Well done Kurt!
MDK is a fast third person shooter that puts you inside Kurt's remarkable coil suit to fight against aliens that are trying to conquer Earth. For that, you're equipped with an infinite-ammo chain gun and a sniper rifle, combined with a lot of items (nuclear bombs, did I mentioned that?!) that can be obtained along the game (I mean NUCLEAR BOMBS!).
The campaign is linear, with six worlds to complete. It's a classic, tremendously funny. I still can enjoy it like I did in 1999.
If you're not familiar with classic games, give it a try on a sale. Otherwise you probably already have it on your library. ;-)
NOTE: The Steam version comes up with some bugs on newer systems (such as slowdowns and missing textures). There's a patch available that fix them all