Here is the full list of all 15 CPUCores :: Maximize Your FPS achievements.
Your system has 4 or more CPU Cores
You've used CPUCores to boost your FPS for this many hours: 25
Used the Halloween theme
You are now using CPUCores!
Your system has 1 or more CPU Cores
Your system has 2 or more CPU Cores
Your system has 6 or more CPU Cores
Your system has 8 or more CPU Cores
Your system has 10 or more CPU Cores
You've used CPUCores to boost your FPS for this many hours: 50
You've used CPUCores to boost your FPS for this many hours: 100
You've used CPUCores to boost your FPS for this many hours: 250
You've used CPUCores to boost your FPS for this many hours: 500
You've used CPUCores to boost your FPS for this many hours: 1000
You've used CPUCores to boost your FPS for this many hours: 2000