Mission: Mainframe

Mission: Mainframe is an interesting strategy / RPG game with a sci-fi / cyberpunk aesthetic. Your goal is to rise through the office tower, find the mainframe, defeat its operator, and return to safety. The presentation uses text mode and is thus mostly text-based, although you do view a map of sorts of the current floor you're on. Move around and navigate various encounters, battling NPCs and finding / hacking information. It seems like quite a deep game and there is a lot of help included within the program. Apparently it's inspired by The Wizard's Castle from 1981.