Looks like a neat game by MIT for Win/Mac.
http://gamelab.mit.edu/games/a-slower-speed-of-light/
"A Slower Speed of Light is a first-person game prototype in which
players navigate a 3D space while picking up orbs that reduce the
speed of light in increments."
"You collide into a lot of things in the game, and technically, the
visual effects should change drastically with every bump," explains
Tan. "The resulting fluctuations in color and brightness caused such
intense nausea that some testers couldn't make it halfway through our
game."
Challenge accepted.
s.