Taken from The Big Bang Theory episode 'The Creepy Candy Coating Corollary'

Stuart: Hey, Sheldon, the new Green Lantern figurine’s coming in tomorrow. Want me to set one aside for you?
Sheldon: Thank you. You just robbed me of the opportunity to stumble upon the figurine and make the oh-so-satisfying journey from discovery to desire to possession.

Taken from The Big Bang Theory episode 'The Dumpling Paradox'

Leonard: Sheldon, think this through. You're going to ask Howard to choose between sex and Halo.

Sheldon: No, I'm going to ask him to choose between sex and HALO 3. As far as I know sex has not been upgraded to include high-def graphics and enhanced weapons systems.