The game before Runner 3d. Sorry mac & Linux users, this one is Windows only.
I dug up and found the "completed" version of Runner that I made with Gamemaker 8 by YoYo games when I was 12 years old. Because it was GameMaker 8 lite there were plenty of restrictions, and I could only make a Windows .exe file. Although Runner 3d does look VERY similar to this game, they are still 2 different games, which means finishing this game will not ruin the surprises coming up in Runner 3d. There is no 1 player mode on this one.