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