Frags4Fun wrote on Feb 12, 2013, 13:34: Yeah, they sure do hurt sales, if the game sucks to begin with.
Some good games have bad demos. And other games have too good demos. While I'm sure GTA and Carmageddon sold very well due to word of mouth from their demos, I also think the demos were so satisfying (especially if you removed the time limit) that they made actually purchasing the game superfluous.
Same for Quarantine. Loved that demo! I put dozens upon dozens of hours into those three demos and sadly never bought the games. Can't imagine I was the only one.