Starfield:Panoptes

Ares Engines
The Areas engines are Panoptes's line of smaller, A class engines.

Hercules Engines
The Hercules engines are Panoptes's line of medium, B class engines.

Poseidon Engines
The Poseidon engines are Panoptes's line of large, C class engines.

Altas Engines
The Altas engines are Panoptes's line of massive, M class engines. These are not purchasable in-game.