How do you get 101 percent on crash bandicoot 2?

To achieve 101% completion in Crash Bandicoot 2: Cortex Strikes Back, you need to collect all the gems and complete the game’s levels with perfect performance. This involves collecting all the colored gems, which require specific tasks like breaking all boxes and completing levels without dying. Additionally, you must defeat the final boss and unlock the secret levels, including the hidden gem paths. Completing all these objectives will allow you to reach the 101% completion mark.