5 hours unlocks the Samurai Edge .40 S&W Handgun (unlimited ammo - burst fire)
3 hours unlocks the Infinite rocket launcher
so the game gives you weapons that would have made the game much easier AFTER you have completed the game.... but it only gives these weapons to the people who had the least difficulty playing the game (i.e. completed it quickly).. is that what I am reading?
[Edited by Caliber, 1/21/2015 3:22:09 PM]
yeah Cal, I never understood the idea behind it either. I will try and pull up the info for you.