Complete the Forest area on any difficulty.
Complete the Sewer area on any difficulty.
Complete the Underground area on any difficulty.
Complete the Mines area on any difficulty.
Complete the Dungeon area on any difficulty.
Complete the Electric Zone area on any difficulty.
Complete the Lava Cavern area on any difficulty.
Complete the Mechanical Nightmare area on any difficulty.
Complete the Forest area on Hard difficulty.
Complete the Sewer area on Hard difficulty.
Complete the Underground area on Hard difficulty.
Complete the Mines area on Hard difficulty.
Complete the Dungeon area on Hard difficulty.
Complete the Electric Zone area on Hard difficulty.
Complete the Lava Cavern area on Hard difficulty.
Complete the Mechanical Nightmare area on Hard difficulty.
Complete the Forest area on any difficulty without dying. Death allowed if you go back to first screen afterwards.
Complete the regular game with 250 or less deaths. Easier or greater difficulty.