collect all cubes on any two bonus levels
collect all stars on any three levels of the great tree
collect all stars on any single level of the great tree
collect all cubes on any five cooperative levels
collect all cubes on all cooperative levels
pass the "world of steel and machines" level without falling
pass the "abandoned factory" level without falling
pass the "old mine" level without falling
pass the "steamcity" level without collecting any contaminated fuel clots
pass the "rescue attempt" level without collecting any contaminated fuel clots
pass the "gears, gears..." level without collecting any contaminated fuel clots
collect all contaminated fuel clots on "black wings in the dark" level
collect all stars on all levels of the great tree
collect all cubes on any five bonus levels
collect all cubes on all bonus levels
have no less than 1000 fuel points at the end of any level
collect all berries in the "at the gates of the unknown" level
collect all stars on any three levels of the sky pillar
collect all stars on all levels of the sky pillar
