At first I thought this game was broken... Once I fixed the lag issue I found that this is one of the most enjoyable third-person sandbox games for casual play, when I'm in the mood to lounge on the couch with a game pad, I turn on Steam's Big Picture Mode, launch the game and massacre the city for hours. The Radnet DLC add hours of challenges to beat friends high-scores.
Many ATI Radeon users have experienced a memory leak that has made Prototype 2 unplayable. This fix seems to eradicate the issue and locks the client at 30fps, almost perfectly stable.
1. Run Prototype 2 and disable Anti-Aliasing in the game client
2. Download and install Radeon Pro Preview http://www.radeonpro.info/download/
a. Create a profile for Prototype2.exe by searching in steamapps/common/prototype2
b. On the "Tweaks" tab:
VSync control : Always on (Double VSync)
Dynamic Framerate C Keep up to : 30 FPS Max
c. On the "Advanced" tab:
Flip Queue Size = 1 (Set to 1 and Check to Enable)
3. Right click on the profile your created in RadeonPro and click "Apply Now"
4. Ensure RadeonPro is running and start the game normally.
5. Play the game and enjoy!
Posted: 26 September 2013