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