Mari0 is a Super Mario Bros and Portal mashup currently under development. Previously, the same developer made Not Tetris; a faithful reimagining of the original game, but with the addition of realistic physics and geometry.
Vs. Airman is kind of mind-blowing the first time you see it. It is not a PC or flash game, but a romhack that can run on a real NES. But which game is it a hack of? [more inside]
Animator OrinCreed said I Dream In Retro is "based heavily on a dream I had that was caused by a long day of playing NES, SNES, and Genesis. In the dream I was moving through different levels from many games. In each level the music was wrong and my sprite (while fitting the bit style) didn't quite work with the game. During the dream I was abusing a cheat ability to use different weapons from pretty much any game I wanted at any time. The game itself behaved as it should, with my actions being the only aberration." The result was this loving tribute and mash-up of video game titles.