Battlefield 2 is up there for sure.

Really not sure what people see in Heavy Rain to be honest?

I guess Final Fantasy XII. I haven't played too many demos. I bought DQ 8 for the 12 demo. Lol.

Off the top of my head, I'll go with Battlefield 2, Bad Company, and Bad Company 2. They were multiplayer demo's and I could play them for large amounts of time.

The demo for age of empires 2.. It had a profound effect on my future interests (no joke)

Of course, I was small back then.

AvP2 was fun, oh and Quake, back when demos actually had a decent amount of content.

I think mine was a medal of honour demo on the PC. You fight your way through some buildings in france (against WWII nazis ofc) and then down a cow lane to a graveyard, then past a church to a field covered by AA guns which you have to blow up with charges.

I played that demo so many god damn times. And the fact that it had lots of parts that looked like Saving private ryan was also awesome.

GoW III all the way !

Bioshock, entering Rapture for the first time is unbeatable imo

shadow complex, the entire game was in the demo

Warhawk.