I have an idea for a 4 person map consisting of consecutive, randomly selected minigames (Not original, I know, but I don't think anyone else is working on one).
Additional minigames would be added over time- the idea is pretty basic and the range and type of minigames possible is limitless.
If anyone wants to be involved with this/can think of mini games they'd want to see, please post here.
Current Minigame Ideas:
-Battle Tanks (WASD controlled tanks, fire cannon with spacebar. last man standing in a battle torn arena)
-Tron-like lightcycle (I may or may not have 'borrowed' this idea from another thread)
-Shooting Gallery (Simple mouselook shooting on moving targets in the background. Differing points awarded based on how far away the target is)
-Mini Hero Arena (4 person FFA with simple units with multiple abilities, requiring superior micro)
-Maze Run (1st person randomly generated maze navigation)
-Escape! (2D sidescrolling action, where players must jump over obstacles to avoid being eaten by an ultralisk)
-Hellion Racers (3 laps around a short racetrack)
-Archon Wrestling (Objective is to stay in the ring. Player's Archons are given abilities to 'push' each others)
Either way, I love it. There are already so many publicly shared movement/camera systems, score boards, and such that it would probably only take someone with previous experience a handful of hours to make a rudimentary version of this with at least 5 different games, probably more.
With first person, 3rd person over-the-shoulder, top-down, GUI-based, and classic SC control schemes... you could do so very much.