Hello, today i saw something (and tested it),
that could be used for the new 20 slot server.

http://www.garrysmod.org/downloads/?a=view&id=61453

This are 6 funny minigames with a menu that allow quick swiching the mos.

There is an map pack since 2 weeks so there are more maps
http://www.garrysmod.org/downloads/?a=view&id=62940

There are many other mods then this six, too.
All games using the Simple Game Base can be added to this mastermod.