The Chaos Run Add-on for Rocket League has 5 achievements.
Equip any Chaos Run item and win a 4v4 Online match
With Grog, Score 10 Goals against Pro-level Bots or higher
With Ripper, Score 10 Goals against Pro-level Bots or higher
Make 50 total "Shots on Goal" using Grog or Ripper
Equip the Mohawk and Demolish 3 opposing Bots in the Wasteland