Heatseeker was a limited-time game mode that was introduced on April 16, 2020.
On June 17, 2020 it was announced that Heatseeker would return for a day as 2v2.
"In Heatseeker, the ball will automatically seek the opposing net once it's hit. But, make sure you don't miss the goal! If the ball hits the backboard, it will fire back toward your goal. Make sure to think fast, because every time the ball is touched by a player or a backboard, it gains speed! First team to seven goals wins."
Players who logged in to Rocket League at any time when Heatseeker was first introduced on April 16, 2020 received the Hypnoteks banner.