Here is the full list of all 38 Pitfall Planet achievements.
Seriously, what's up with that?
Find the frozen miner.
Find the secret arcade.
Collect every gem in Pitfall Planet.
Throw your friend off within 10 seconds of starting a level.
Collect all the gems in the Mountain Core.
You've bought all the hats!
Find Kate's launchpad and her final diary entry.
Complete every level in Pitfall Planet.
Complete the Mountain Core.
Complete the game while always getting both players into the elevator.
Complete the Rose Caverns.
Collect all the gems in the Rose Caverns.
Complete the Dead Desert.
Collect all the gems in the Dead Desert.
Complete the Old Watchtower.
Collect all the gems in the Old Watchtower.
Reunite all the missing astrobots.
Beat the race challenge in 30 seconds.
Complete the Dead Caverns.
Collect all the gems in the Dead Caverns.
Collect all the gems in the Factory.
Complete the Factory.
Find the hidden gem cave.
Complete Greenwood Falls.
Collect all the gems in Greenwood Falls.
Complete the Mountainside.
Collect all the gems in the Mountainside.
Complete Sewage Treatment.
Collect all the gems in Sewage Treatment.
Buy 5 hats.
Buy your first hat.
Complete the Outpost.
Collect all the gems in the Outpost.
Complete the Chimney.
Collect all the gems in the Chimney.
Collect all the gems in the Tutorial Caves.
Complete the Tutorial Caves.