Infinite grenades(multiplayer):To get infinite grenades in multiplayer mode, first get some smoke or frag grenades. Take out your Lancer and do an Active Reload, then immediately switch to your grenades and while you are switching press B. Press RB either 5 or 10 times depending on the game. Throw a grenade. The ammo counter will read zero but you will be holding a grenade.Insane mode:To unlock insane mode, complete Campaign mode on Casual or Hardcore.Quick Reloading:When reloading your weapon, watch the upper-right corner of the screen for a meter that counts down. Press the reload button a second time when the meter