I recently participated in Ludum Dare #25. This was my third attempt at Ludum Dare. This time I chose to build a multiplayer game. It was much more challenging to do it this way.
Players start out as demons walking around a castle. Thematically I was trying to make it seem as though the players themselves were the “bosses” that had captured a princess.
Players can chat in the game.
Other players can join, and shoot fireballs at you – stunning you for 20 seconds.
I am pictured above being burned to death by a fireball from Ricky. Damn you Ricky.

The goal is to capture the princess by touching her.
The person who holds her at the end of every 60 second round, gets the point.
I spent 90% of the time getting everything working, and setting up the client/server architecture. I didn’t have time to do much else. It was only on the last day that I decided to implement the princess theme, and turn it into what is essentially 2d doom deathmatch mode. I took the art from “Oryx – LOFI Fantasy 2D/3D [FINAL]” pack, which is a free open-source art pack that anyone can use (google it). The rules clearly state, however; that I am not allowed to use an artpack, so I am probably disqualified. It was fun, though; and I don’t care too much about that.