Sorry because lately I'm somewhat involved with many personal projects and some of then for the Pi.
User Takenover83 present us UltraSlim: a minimal version of Raspbian to have an ALL IN ONE OPERATING SYSTEM loaded with emulators, Quake 3, LXDE and XBMC...
This is what we get:
LXDE (minimal desktop with file browser, terminal, netsurf...)
XBMC - 12.2 Frodo
Tweaks to improve memory usage.
EmulationStation (boots to this, where you can launch other stuff, like emulators, LXDE, XBMC, etc..)
Quake III Arena (need to copy the .PAK files inside)
Overclock to 900/450/450/2
Retroarch with Atari 2600, Sega - Megadrive / Genesis / Sega CD / Mega CD, Nes, SNES, MAME, Playstation and Muppen64plus
Download: Mediafire (279 MB)
Another project by Takenover83: raspberrypi.org > [ALL IN ONE] Ultimate Raspbian - XBMC, Gaming, Desktop