Here is the full list of all 26 TEOCIDA achievements.
Access the terminal
It probably never ends
Follow their language
Rescue zeta
Rescue delta
Rescue beta
Rescue alpha
Rescue epsilon
This seems important
Rescue gamma
Return to the program
Assimilate a principle
Defeat your son
Find the patriarch's herald
Choose your side
A virus in the program
Solve the old puzzle
Solve the window puzzle
Find the first of many secret chambers
Look for it