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silver pair
collect all cubes on all cooperative levels

sky silver
collect all stars on all levels of the sky pillar

alert adventurer
pass the "steamcity" level without collecting any contaminated fuel clots

alert mechanic
pass the "gears, gears…" level without collecting any contaminated fuel clots

alert rescue ranger
pass the "rescue attempt" level without collecting any contaminated fuel clots

bronze pair
collect all cubes on any five cooperative levels

mad cleaner
collect all contaminated fuel clots on "black wings in the dark" level

master engineer
pass the "abandoned factory" level without falling

master miner
pass the "old mine" level without falling

master researcher
pass the "world of steel and machines" level without falling

sky bronze
collect all stars on any three levels of the sky pillar