This cheat is for beginners. Shot Boilers in there head and take them out fast and protect Rockie from them.
Connect your PSP to your PS3 while running Resistance 2 to unlock the Infected mode on your PSP. This will allow you to access Infected Intels that will be otherwise unavailable on the main playthrough.
When you pick up ammunition for a weapon it will be automatically reloaded. Use this to your advantage when attacking near ammunition caches. Strafe while firing when getting low to pick up the ammunition and instantly reload.
Complete the indicated task to unlock the corresponding weapon.
HE .44 Magnum: Collect all 67 Intel pieces.
Longbow 1S-1K: Collect all Retribution Intel pieces.
Plasma Grenades: Collect all Secrets Of The Maquis Intel pieces.
XR-004 Allure: Collect all Cloven Lore Intel pieces.