[nkassis]

That's what I admire about John Carmack. He wants people to hack his games and do stuff with them. He pushes to release old engines as GPL (soon the Doom 3 engine will be released, offering some real game code to study for people wanting to get into game development)

[grey]

Notch has a similar attitude, as expressed at http://www.minecraft.net/about.jsp,

specifically "once sales start dying and a minimum time has passed, I will release the game source code as some kind of open source."

[0x0x0x]

The difference of course is that id has a track record.

[piaskal]

Id games have lot's of artwork, levels, etc. that is not released under GPL. In minecraft it's users that create the content. Id can release their engines under GPL without harming their sales.

[beagle3]

This comment would be meaningful when Minecraft has been out in the market for 3+ years.

[atomicdog]

The difference is id's sources aren't shitty Java applets that noone wants to look through ;)

I kid, I kid...