Doom, one of the classic first person shooters, has been ported to a calculator. While many may remember playing drugwars on their TI-83+, kids today can now play Doom on their TI-Nspire calculator.
After seeing clones of Doom arriving on calculators a few years ago, the real game is finally arriving on them, specifically the TI-Nspire and TI-Nspire CAS models! It's still in beta, though: As for now, the game runs for 20-60 seconds then freezes randomly.
Some animated GIF captures can be found on the site. They look much clearer than in the video, but the framerate is much slower.