Shadowgrounds

Top-down shooter where you fight through alien-infested facilities with upgradeable weapons. Combat centers on crowd control—mowing down swarms while managing ammo and positioning. The weapon upgrade system lets you modify your arsenal's stats and behavior as you progress. Story follows a colonist caught in an extraterrestrial attack, though the focus stays on firefights over narrative. Supports local co-op on one keyboard or with joysticks, splitting controls between two players. Expect constant enemy waves, explosive effects, and tight corridors that force you into close-range chaos. If you want twin-stick shooting with progression hooks and don't mind dated visuals, it delivers straightforward alien extermination.