In this game, one character claims to have been killed by mercury-injected shower curtains, but it is revealed that he died from consuming a moon-rock-based food additive. At its conclusion, former enemies serenade the protagonist with the aria "Cara Mia Addio" as she ascends towards the earth's surface. Another character was told he would die if he detached himself from a railing and later turns a former antagonist into a (*) potato battery. Stephen Merchant, co-creator of the U.K. version of The Office, voiced this game's antagonist, a "personality sphere" named Wheatley. Jonathan Coulton wrote "Want You Gone" for this game and "Still Alive" for its prequel, which 
In this game, one character claims to have been killed by mercury-injected shower curtains, but it is revealed that he died from consuming a moon-rock-based food additive. At its conclusion, former enemies serenade the protagonist with the aria "Cara Mia Addio" as she ascends towards the earth's surface. Another character was told he would die if he detached himself from a railing and later turns a former antagonist into a (*) potato battery. Stephen Merchant, co-creator of the U.K. version of The Office, voiced this game's antagonist, a "personality sphere" named Wheatley. Jonathan Coulton wrote "Want You Gone" for this game and "Still Alive" for its prequel, which sees Chell attempt to take the down the computer GLaDOS. For 10 points, name this 2011 video game by Valve Corporation that centers on placing blue and orange versions of the title object.
In this game, one character claims to have been killed by mercury-injected shower curtains, but it is revealed that he died from consuming a moon-rock-based food additive.
Portal 2 [do not accept or prompt on "Portal"]