If you still don't own Stellaris it's currently free with Amazon Prime Gaming

Quick tip - GOG and Amazon Prime Gaming have teamed up to give subscribers an offer they can't refuse - another free game! Get a copy of Stellaris from Paradox Interactive / Paradox Development Studios.

Read the full article here: https://www.gamingonlinux.com/2022/02/if-you-still-dont-own-stellaris-its-currently-free-with-amazon-prime-gaming