The Anniversary Update Title update for Rocket League has 6 achievements worth 250 gamerscore.
Trade In five items of the same quality to receive an item of the next-highest quality
Equip a Very Rare Item and complete a game in an Arena with turbulent weather
Score or Assist a combined 30 goals or assists in Casual or Competitive Online matches
Head to Champions Field and complete an Online game
Complete all placement matches in any Competitive Playlist
Trade and receive one or more items with another player in a single transaction