Steam is an online platform that allows users to download and play PC games. The service is operated by Valve. Several Halo games on Steam offer Steam rewards.

Halo games available on Steam

• Halo: Spartan Assault (2013)
• Halo: Spartan Strike (2015)
• Halo Wars: Definitive Edition (2017)
• Halo: The Master Chief Collection (Upcoming)