Define Game-changing Meaning

Game Changing Build
When a concrete cowboy adds a Kings awning or other extremely cheap and common modification to an overpriced farm vehicle with manually operated windows, such as a 76/79 series LandCruiser.

Me mate just spent $120k on his game changing build in Hunters Hill!
By Lulita
Rage Quit Game Change
The act of getting so angry with a game that you quit and put in a new, usually completely different game just to make yourself calm down.

Bob: What happened?
Tim: Dan did a rage quit game change. He got so pissed of at the noobs on COD that he took the game out of his xbox, threw it across the room, and put in need for speed
By Essa
The Game Has Changed
A blanket statement used in a situation where one party intentionally acts against the wishes of another party, despite initially agreeing to their terms. Broad enough to confuse the target, but vague enough to deter any further questioning. For maximum effect it should be said with an air of mysterious confidence.

Guy 1: "What's the deal bro? I called dibs on that chick, and now you're chatting her up?"

Guy 2: "The game has changed, my friend. Now run along, I'm working here."

Guy 1: "...Whatever, man."
By Belita
Game-changing
impacting the course or outcome of events through the actions of an individual. positively connotated.

"With outstanding intelligence, wit and guts Kristof invented game-changing moves that left a mark on modern socializing forever.
By Merry