If you’re looking to trade keys on Xbox One’s popular Rocket League, you may be out of luck. Xbox Live’s trading system doesn’t currently support keys, according to a spokesperson for the game’s developer Psyonix. That means you’ll have to find someone who has the game and wants to trade it for something else. Rocket League is a fast-paced sports game in which players control cars that launch into space and race against each other on an elaborate stadium. The game has been praised for its innovative gameplay and high level of polish. ..