From JC2-MP Documentation
AMD's graphics drivers codenamed Crimson are not compatible with Just Cause 2 Multiplayer. If you are using an AMD graphics card with Crimson drivers, and your game crashes almost immediately after launching, try one of the following solutions:
- Install Catalyst Drivers: Catalyst is the previous generation of AMD's drivers which are known to work with Just Cause 2 Multiplayer. Please visit AMD's website for more information. Be sure to uninstall your Crimson drivers so that there are no conflicts.
- Workaround: Extract these dll files into your Just Cause 2 folder (the base game, not the multiplayer mod). This is usually located at C:\Program Files (x86)\Steam\steamapps\Common\Just Cause 2\. This should work as a fix for JC2-MP while using Crimson drivers.