While you must be eager to play Marathon Server Slam, the current scenario is restricting the majority of the players from doing that, resulting in a "failed to launch on Steam" error.

Since the launch of Assassin's Creed Shadows today, anybody—including PC gamers—can dive right in and explore the vast open world. Nevertheless, the game has a number of problems that keep many ...

You can try launching Steam with administrative rights. Right-click on the Steam desktop shortcut and select Run as administrator. Click Yes in the UAC prompt. If this works, you can make Steam always ...