I found this old thing in my source code archives today and I thought you guys might get a kick out of it.
I made this in summer 2000. I was fresh out of Uni and had just completed a course in "computer graphics" which was meant to focus on OpenGL but the teacher didn't actually know the library so we were left on our own to figure it out. I got through the course with enough knowledge to pass, but left unsatisfied as I really wanted to master OpenGL, I figured it was my ticket to getting into the games industry. So that summer I set out to learn it.
This was in the internet's lean days, where there were 1-2 sites with actual source to OpenGL code you could learn from. I wrote a whole bunch of demos over the course of that summer and one of them was to experiment with red-blue 3D glasses and the "new" alpha blending modes which had just been accepted into the OpenGL specs. One of them was additive blending and the only card to support it at the time was the nVidia TNT. Luckily my friends were pretty up to date on the growing 3D accelerator trends and suggested I get that card when I built my PC.
The first iteration of the demo was a ball that oscillated back and forth, rendered twice - one from each "eye"'s viewpoint using the different colors. The result was really cool so immediately I set out to make a game of it. I had no knowledge of 3D modeling software (there were only 2-3 programs at the time, and were very expensive) so I made all my models by drawing them on graph paper and typing in the coordinates by hand.
Anyway here is the result, an analglyph 3D asteroids game/demo where you're inside the ship and you need to blast through the asteroids and fight off enemy waves. Blasting open asteroids will sometimes give you power-ups (I've increased the probability of getting a powerup in this version). There's no end-boss or ending to it, it just gets slightly faster the more you play. You can play without 3D glasses (turn off 3D in options), but it misses the point. It's a real blast to play if you've got the glasses. Try to get a few powerups, the "quad lasers" is REALLY cool with glasses.
It hasn't aged that well as far as UI code, so depending on your screen resolution, you might have to click a bit left or right of the menu buttons for them to actually work.
ARROW KEYS steer your ship, mash CTRL to fire lasers and use SPACEBAR for a stronger cannon which can only fire so often.