I never played Terrible Posture Games Tower of Guns (2014), but I just might have to now that Ive experienced the wonders of MOTHERGUNSHIP. For all intents and purposes, MOTHERGUNSHIP is a first-person, bullet-hell, dungeon-crawler set within the machinations of a robotic alien threat that has surrounded Earth.
Source: N4G PC MOTHERGUNSHIP Review – Gun Crafting Dungeon Crawler – The Indie Toaster