I use this files to teach basic BGE.
all files is licenced under CC 0 except:
lowpoly_concrete_barrier
By cr0wb4r
http://www.blendswap.com/blends/game-engine/low-poly-worn-construction-barrier/
Laternenpfahl
By Inkman Blender
http://www.blendswap.com/blends/architecture/lamppost-2/
the audio files is a part of my first animation "el pequeño gran libro"
http://dl.dropbox.com/u/1144613/orangebeat/el%20pequeno%20gran%20libro.tar
Do you know Blendercontest.com is currently running a