NA PS3 demo:
http://www.gamespot.com/event/codes/lara-croft-ps3-us/
EU PS3 demo:
http://www.gamespot.com/event/codes/lara-croft-ps3-eur/
PC demo:
http://www.gamespot.com/event/codes/lara-croft-pc/
I believe it's just the demo but who knows, get yours while supplies last.
http://www.gamespot.com/event/codes/lara-croft-ps3-us/
EU PS3 demo:
http://www.gamespot.com/event/codes/lara-croft-ps3-eur/
PC demo:
http://www.gamespot.com/event/codes/lara-croft-pc/
I believe it's just the demo but who knows, get yours while supplies last.