what's worked best for my game Dead By Zombie: 1. personal appearances at game conventions dressed as the mad scientist Dr. Heinrich von Hexenhammer --- NOTE: may not work for your project 2. listings on niche sites 3. astroturf forum comments on related sites paid advertising? oh that actually hasn't worked too well in comparison. funny.
What are astroturf forum comments?
I'm sure it's pretty effective, especially if you only need to get a handful of people to notice your product. But it just feels so dirty...