The Humble Store’s Spring Sale is currently underway, with massive discounts on more than 4,000 games across the store. One of the benefits of the sale is a free game up for grabs, and this time it’s Ashes of the Singularity: Escalation, Stardock’s massive-scale real-time strategy game.

In order to claim the free game, you will need to sign up for the Humble Newsletter, and in return you'll receive a Steam key. The game is free to keep after you have activated the key, but the code must be used before May 14, as it will expire after this date.

Ashes of the Singularity is free until May 10, so make sure to grab it before it disappears. The Humble Store Spring Sale is on until May 21. Plus, check out more free games you can claim right now on PC and other platforms.