The Sentient achievements

Complete a sector with all current crew members dead.

Unlocked the training necessary to recruit Earth's elite pilots to man the power armor suits.

Unlocked the ability to use power armor.

Cleared 5 sectors before returning to earth.

Clear a sector with just one mechanic and one flight crew member.

Unlocked the battlecruiser.

Unlocked the battleship.

Have a current crew member die while on the ship.

Successfully cleared a sector.

Returned back to Earth after a successful cleared sector.

Won a battle against an enemy ship.