Blaze is a sci-fi first person shooter action game. It's about shooting a lot of alien mutants in semi-randomized missions. The alien mutants are trying capture all your base, and have already captured at least half of it. You have to defend your base and capture the alien controlled areas back.
Soylent Green is Bug People! They're going to throw some bio grenades with one arm and slash in melee with the other.
There's also the new Gauss Shotgun. It could share ammo with the Grenade Launcher. One ammo would fire 8 pellets in a quick burst, then some delay before next shot. The pellets could either explode or go through some targets, possibly hitting someone behind the first target.
It's like a mix between Shotgun, Minigun and Railgun.