games that revolutionized their genre

what are games that revolutionized Their genre according to you.

For me

RTS - StarCraft, command and conquer

RPG - Zelda, oblivion

Fps - counter strike, halo, cod 4

Racing - gran turismo

Tps - gears

Open world - GTA 3

Zelda isn't an RPG (except for the second one). Also, what exactly did Oblivion bring that was new?

Also, listing FPS and not putting Half-Life? For shame.