Chaos Theory is an achievement that requires the player to obtain all unique drops from the Chaos Elemental. Completing this achievement also grants the cHaOs title.
- As of 25 January 2018, 158 people had achieved this feat.
- The name of the achievement references Chaos theory.
- ^ Jagex. Mod Ryan's Twitter account. 25 January 2018. (Archived from the original on 26 December 2019.) Mod Ryan: "The Boss Collection log has been out for nearly 5 months now and here are the current completion counts for each of the feats!"