Here is the full list of all 25 Creature in the Well achievements.
Find all capes
Destroy 100 drones using EMPs
Help Roger mop the floor
Charge 7 orbs at once
Find Phillip's prototype
Save Mirage from the sandstorm
Find all of Danielle's tools
Enter the Creature's well
Unlock the Weather Control Monolith
Fully upgrade the BOT-Core
Find all the lore
Heal a total of 1,000 health absorbed from anomaly balls
Generate a total of 2,000,000 power
Find the scavenger's hidden stash
Get thrown out of the machine
Unlock the Support Monoliths
Find a secret strike tool
Upgrade your BOT-Core
Let's play
Activate the Power Reserves
Hit 20 bumpers with one shot
Find a secret charge tool
Generate 1,000 power in one hit
Open the temple
Try to escape the sandstorm