The Humble Bundle store, popular for its low-priced and charity-based game bundles, is currently running a 72-hour giveaway event for strategy game Ashes of the Singularity: Escalation (Windows), to be claimed on HB before May 10 at 10am PT.
How to unlock Ashes of the Singularity: Escalation
You just need to go to the Humble Bundle’s page to claim the key by pressing the big green “Get the Game” button. Then follow the instructions (such as creating an HB account if you don’t have one, and linking a Steam account), to get the key link sent to your email address. Once you have your own game key, head over to Steam to redeem it.
Note that claiming the game also implies that you subscribe to HB’s newsletter (box ticked by default). This promotion is available until May 10 at 10am PT.
*Need more directions? Here is the full instructions page from the Humble Bundle store on Redeeming Your Game Keys on Steam.
About Ashes of the Singularity: Escalation
Ashes of the Singularity: Escalation is a massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat.