Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A helping head	Boost up on an explorer.
All aboard!	Find the sneaky coin in level seventeen.
Archaeologist	Find the Lantri!
Around I go	Get onto a spinning platform that you control.
Foresight	Complete any Winterfest island without using undo.
Gold!!!!	Discover the hidden treasure.
Leave no man behind	Boost down on an explorer.
Let's try this again	Undo twelve times in a row.
Near sighted	Smash a distant pot in level nine.
Open sesame	Enter the hidden chamber.
Pathfinder	Complete twelve levels without using undo.
Ready for summer	Complete Winterfest.
Relic smasher	Break seven pots in three seconds.
Scavenger	Collect all the coins.
Thrill seeker	Ride thirty elevators.
Turn back time	Get unstuck after being stuck.
Woo!	Get an explorer to say "Woo!"