During the month of May Rocket League will be releasing limited-time game modes every weekend.
It starts on May 1 with with Dropshot Rumble. Just like the name suggests, the two Extra Modes have collided for the action of Dropshot enhanced by the zany power-ups from Rumble.
From the Rocket League website:
Each mode will begin at 9 a.m. PDT (4 p.m. UTC) on their respective launch days, and will end at 9 a.m. PDT (4 p.m. UTC) on their end dates. Like other Limited Time Modes, each mode will be Unranked and found in a separate tab in the Play Online menu. They will also grant the same amount of XP as all other Online Playlists, so you'll still Tier Up your Rocket Pass 6 level as usual.
Here are the game modes and their dates:
May 1 - May 4: Dropshot Rumble May 7 - May 11: Beach Ball May 14 - May 18: Boomer Ball May 21 - May 26: Heatseeker