ASCIIpOrtal is described as 'See high res text graphics. Master physics bending puzzles. Escape the test chambers. Play ASCIIpOrtal! The text-based game with a geometry breaking physics gun'. There are eight games similar to ASCIIpOrtal for a variety of platforms, including Windows, iPhone, iPad, Mac and Linux. The best alternative is Portal. It's not free, so if you're looking for a free alternative, you could try GlPortal or Narbacular Drop. Other ASCIIpOrtal like games are Portile (Free, Open Source), Doctor Hoctor Boing (Freemium), Magic Portals (Freemium) and Magrunner: Dark Pulse (Paid).
Portal™ is a puzzle game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative games on the horizon and will offer gamers hours of unique gameplay. Represent entire series of Portal games.
Narbacular Drop is an environmental puzzle game in a fantasy setting, where the player navigates a dungeon with two interconnected portals. The dungeon has a series of traps and puzzles, which the player must solve by moving around objects in the environment using the portals.
On a verge of a great discovery, Doctor Hoctor Boing has been sabotaged, Doctor Hoctor and his laboratory companion the squirrel have been framed by the Professor Crappy. The lab's compounds stolen and professor Crappy ran through a puzzle of portals! What to do?!
Magic Portals is an addicting game that combines classical platform adventure gameplay with challenging puzzle elements, featuring portal spells which are used to teleport almost anything in scene! Opening the path to the level checkpoint.