Prophecy2k
Veteran
Just thought of another one which was Worms, the orignial on Amiga. They gave the users access to parameters for gravity and friction and stuff, and you could design your own maps as bitmaps, which lead to variations with the gameplay that the edfault game didn't offer. Just providing access to parameters is an easy way to add variety to your game. If it were me, I'd have that in every game at least as an option unlocked when the player completes the first run through. You can provide a tailored experience, and then give them room to experiment.
This is actually a fantastic idea!!
I'd love to see this kind of things in more games. Hopefully Starhawk will set a precedent for Sony's first party online offerings, and then the rest of the industry will follow suit.
I also dig Pastu's idea for a LBP of FPS'... although i think it would have been a bit difficult to do with MAG given the 256 player ginormous maps. They should have done that with SOCOM 4 though... i love the gameplay in that game, especially with MOVE. Had they done it so that you could not only make your own co-op scenarios by picking pre-made levels, but instead made it so that you could actually craft the levels yourself, that would have been awesome!