From the Depths achievements

Destroy the Gorgon in Quest for Neter on Hard difficulty or above

Use more than 15 RTGs on a vehicle you've made yourself. Unlocked in designer.

Destroy the Quartz Stone in Quest for Neter on Easy difficulty or above

Destroy Eris in Quest for Neter on Easy difficulty or above

Destroy the Raven's Nest in Quest for Neter on Medium difficulty or above

Destroy the Scarlet Dawn in Quest for Neter on Hard difficulty or above

Destroy the Raven's Nest in Quest for Neter on Easy difficulty or above

Destroy the Onyx Throne in Quest for Neter on Godly difficulty

Destroy 1000 missiles in the campaigns/missions/adventures of built in planets (using standard game constants)

Destroy Eris in Quest for Neter on Hard difficulty or above

Destroy the Onyx Throne in Quest for Neter on Hard difficulty or above

Destroy the Raven's Nest in Quest for Neter on Godly difficulty