Here is the full list of all 13 Sillage achievements.
You are awake.
You have given vodka to your drunkard mother...
You have found the old machine.
You killed a Succubus.
You killed a Squid.
You killed a reaper.
You killed a Golem.
You have reached level 20.
You have killed a person unable to defend himself.
You burned all the materials of the revolt.
You have destroyed a capital ship enemy.
You gave all the artifacts to your sister.
You have equipped your ship with superior cannon.