Other games I've played and forgotten about until now!
Making all these lists has reminded me of some other non-Quake 3 based multiplayer games that we play, but I forgot to post them earlier. If I'm given permission to edit my posts I'll copy this into the earlier post and delete this one.
Teeworlds - this game is incredible! It's not the easiest to configure a server, but I made up a little batch file in windows to let you choose the map etc and this would be just as easy in linux. It's totally crazy and brilliant fun. I always get totally whipped if I go online. You can get the source etc here. It's a 2D platform game with tiny levels where there are loads of little smilies with weapons that beat the [email protected]
out of each other. On yeah, you get a ninja rope to move around with as well.
Hedgewars - This is a worms clone made using hedgehogs for some reason. Everyone knows what worms is so it doesn't need any more explanations. The kids aren't quite as into it as the 3D games or Teeworlds, but the multiplayer is good. You can get the code etc here.
Armagetron Advanced - This is a multi/single-player version of the Tron light-bikes games and takes quite a lot of skill. The multiplayer is all done ingame, but the keys aren't the easiest to get used to. It can be compiled etc from here. It hasn't been updated for a while, but it's so simple it doesn't really need it.
Digital Paint: Paintball 2.0 - This is a paintball game based on the Quake 2 engine. It's good fun. The guns etc are pretty realistic and the maps are good fun. The graphics are a bit dated, but it is still being updated even now! You can get the source code etc here.
Right. I've covered all the games I know of and those I found out about when searching around today. If there are any others that COULD be ported to the R-Pi, please let me know.