Predator : Big Game , Predator : Bad Blood, Aliens vs Predator : WAR
The original first predator comic's called simply, Predator...came out in a 4 part series...it's about Dutch's brother who goes looking for him in the jungles and finds the predator (who incidently didn't blow himself up after all) ...it's a really good read.
The best part / unfortunate part is that these comic's have very little actual value. For example, Spiderman comics are worth alot because it's about a character. In Predator comics, Predator is essentially the main character and bad guy. Who often dies in every series basically. Human characters are often just served has fodder for death scenes. No much value to it when you see what I'm trying to say.
The comics you can find pretty frequently on ebay/amazon for very little.