Walkthrough Guide...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Battle-Tested	Complete your first level on Prestige Mode.
Beat the game!	Complete all ten levels.
Beating the Clock	Complete your first Time Trial.
Challenge Accepted	Complete your first Build Specialization Challenge.
Commander	Beat all levels on Prestige Mode.
Efficient!	Complete your first Token Limit Challenge.
MAXED!	Max out the Upgrade Tree.
Master	Complete all challenges in the game.
One down!	Complete your first level.
Pivot!	Refund all your upgrades.
Rough Day	Have a single enemy afflicted with Vulnerable, Burn, Slow, Shock, and Poison simultaneously.
Speedster	Complete every Time Trial.
Strategist	Complete every Token Limit Challenge.
Tactician	Complete every Build Specialization Challenge.
What's this?	Unlock your first Artifact.