Is there an RPG with a story exploiting 'this' idea?

[SHMUPGurus]

Thanks WereKitten, I guessed right when I thought there was a weird word associated with that concept! And whoa, apparently there's also the solipsism syndrome. I never imagined how bad this thought could be (when taken to extreme levels that is). o_O

Now I seriously wonder why I haven't seen an enemy that believes in this concept in other games. I didn't find the strength to finish Star Ocean 3, so I guess I'll never know if that's really what they wanted to portray there...! Still, very intriguing stuff...