The deal is through official Steam key retailer Fanatical. You’ll need a free Steam account to redeem the key.
Here are more details on the game from Fanatical:
With this strategy game, you’ll lead one of four factions and engage in a brutal war for dominance over the planet’s resources.
In the first 4X turn-based strategy game set in Warhammer 40000, you will lead the Astra Militarum, Space Marines, Orks, or Necrons into battle – each with their own unique gameplay, technological tree, units, and heroes. Face a challenging AI or cooperate or compete with friends and strangers across the globe.
Progress through a different storyline with each faction as their destiny on Gladius Prime, a world tainted by the warp, unfolds. In the end, when all the dust has settled, only one faction can emerge as victorious.
Watch a trailer for the game below!