Rocket League has 77 achievements worth 2,200 gamerscore.
Head to 'Arena Preferences' and use all of your votes
Equip the Halo Topper and win a match on Starbase ARC
Complete a match on wasted land, under the sea, and in outer space
Win a Dropshot match via shutout
Score a total of 18 Goals in Dropshot
Damage a total of 320 panels in Dropshot