You can get this game for free and a limited time right now at the HumbleBundle.com store.
In this giveaway I offer you the chance to get my key from this promotion in case it ends and you couldn't get the game for free anymore.

If you win, remember to activate the key ASAP because it's just redeemable until November 22nd, 2018 @ 10:00 am Pacific time.

Get it free for a limited time: https://www.humblebundle.com/store/sins-of-a-solar-empire-rebellion