From my current short playthroughs I gotta say STRAFE is holding up pretty well. You start the game picking a main weapon (Assault Rifle with grenade, Shotgun with flechette bomb, or a Railgun) and take on the hordes of enemies in the levels. Throughout the levels you'll find dropped weapons from others that act as disposable temporary stronger guns, such as Magnums, LMGs, Plasma Rifles, and Grenade Launchers from what i've gotten so far. The enemies range from weak zombie things that blindly charge toward you, small mechanical turrets, and larger zombies with blaster shots at least in the first 3 levels i've played so far. Your main weapon can also be upgraded at special kiosks in the levels that give it new fire modes like a triple shot. Thankfully if you dont like it you can revert the firemode to default at any scrap station. All in all a pretty solid game, and I hope to see the devs give this more support post-launch.
