Call For Backup

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Defend USA in a post-apocalyptic war against ghouls and commies. While some are in control of combat drones, one person becomes the commander. Ground forces rely on the commander's air support, but he can’t see the battlefield. Communication is crucial! Single-player campaign included!

Developer: Serious Sim
Released: Coming soon
Price: Paid
Platforms
Languages: English

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Players on Steam, last 48 hours

No player readings for Call For Backup in the last 48 hours yet. We poll this game every 30 days.

How this is measured

Player counts over time, as we observed them.

Counts people running the game through Steam only. Players on other stores, consoles or launchers are not included.
We poll the busiest games every 15 minutes and quiet ones as rarely as once a month, so a short spike between polls can be missed. Each game shows how often it is polled.
Our player history starts on 19 October 2026. Earlier peaks, including launch peaks, are not in our data.

Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology

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