Amnesia The Dark Descent, one of the few times I've really felt like part of the game and as a result been scared half way to death.
Half Life 2 and Portal, Valve are fantastic at immersion in their single player titles.
Deus Ex, Everything looks so hideously dated but it's so interesting and well thought out.
Demons Souls, that feeling you get when you see an invasion warning, nothing quite like it.
Deus Ex Human Revolution, in particular the dialogue bosses, probably one of the best systems I've ever seen for it and really makes things interesting, especially if you don't use CASIE to help you. Only in Planescape Torment have I taken dialogue choices as seriously and really thought about what I was saying.
Half Life 2 and Portal, Valve are fantastic at immersion in their single player titles.
Deus Ex, Everything looks so hideously dated but it's so interesting and well thought out.
Demons Souls, that feeling you get when you see an invasion warning, nothing quite like it.
Deus Ex Human Revolution, in particular the dialogue bosses, probably one of the best systems I've ever seen for it and really makes things interesting, especially if you don't use CASIE to help you. Only in Planescape Torment have I taken dialogue choices as seriously and really thought about what I was saying.