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