From the back cover:
Last Sentinels is a GM-less storytelling TTRPG for three or four players. It uses a system of key phrases where players negotiate the story and take on different roles as the main protagonist, their enemies, and other minor characters.
Play to tell the story of the Sentinels; giant humanoid mechs capable of wielding devastating weapons and performing agile manoeuvres in zero gravity.
You'll focus on one rookie Sentinel pilot who escapes the besieged planet of AUGUR-V on a titanic starship. They must defend their remaining people from the vast New Alliance fleet that pursues them.
But your protagonist is doomed. Their story will end when they succumb to the intense pressures of expectation and high-stakes combat against a relentless foe.