If you are trying to launch ARC Raiders on PC but keep getting the stupid error message saying that the maximum simultaneous game instances have been reached. The cause is usually a leftover background process that did not close correctly. This issue almost always appears after a session crash or an incomplete shutdown. Thankfully, the fix is quick and requires only a few steps in Task Manager. This guide explains the complete process in a detailed and structured format so you can get back into the game without errors.
Takeaways:
- Learn how to fix the Maximum Simultaneous Game Instances Reached Error in ARC Raiders.
- ARC Raiders too many instances. The game won't start because it thinks it's already running.
Table of Contents
How to Fix the Maximum Simultaneous Game Instances Reached Error in ARC Raiders
The maximum simultaneous game instances error in ARC Raiders is caused by leftover running processes that block a new session from starting. By opening Task Manager, ending ARC Raiders and Pioneer Game services, and rebooting the launcher, you can restore normal operation in less than a minute.
- Begin by opening the Start menu.
- Type Task Manager in the search bar and open it from the results.
Task Manager allows you to view all running applications and background services. ARC Raiders may have created a process that remains active even though the game is not currently running. This prevents the launcher from creating a new instance, which triggers the launch error.
- Once Task Manager is open, scroll through the list of active applications and background tasks. Look for anything labelled ARC Raiders. It may appear under Apps, Background Processes, or Windows processes.
- When you locate the process, right-click it and select End Task. This action forces the process to close and frees the system to launch the game again. Many launch errors in PC gaming result from a previous process still waiting in memory, and Task Manager is the fastest way to clear them.
In some cases, ARC Raiders may leave behind a second running process called Pioneer Game. This may be related to internal engine systems or handling game sessions. If it remains active, it will cause the simultaneous instances launch.
- Scroll through Task Manager again and look for this name. If you see Pioneer Game, right-click the entry and choose End Task. This ensures that all components of ARC Raiders are fully shut down.

Relaunch ARC Raiders
Now, to check if the problem has been fixed.
- Close Task Manager once all related processes have been terminated.
- Launch ARC Raiders again from Steam, Epic, or your preferred platform.
- The game should now start normally without displaying the message about maximum simultaneous game instances.
If the issue returns in the future, repeat the same process. In most cases, it will not occur again unless the game was closed unexpectedly during a previous session.
Restart Your Computer
If you couldn't find the process/s that are running and causing issues, you can restart your computer to clear out any of the processes that are running. This is a pain to do, but it will solve this problem 100% of the time.