Successfully complete Campaign mode on any difficulty setting to unlock the Arc Charger, Backlash Grenades, L11-2 Dragon, Reaper, and Splitter weapons throughout your next game. The Reaper is found near the beginning of the first level when you start a new game. The Backlash Grenades are found in second part of the Manchester level. Go out of the cathedral and through the hole in the wall of the building next to it. When you enter the building, turn left and go through the door. The Backlash Grenades are in the room you are standing in. The Splitter fires a salvo of large rockets. The secondary fire splits each rocket into a wall of mini-rockets. It is similar to the R.Y.N.O. from the original Ratchet And Clank.
Successfully complete Campaign mode to unlock the movie player.
Successfully complete Campaign mode on the Hard difficulty setting to unlock the Superhuman difficulty setting.
Successfully complete Campaign mode on any difficulty setting. Then, select "Options" at the main menu and go to "Cinematics". Look for the last movie in the list called "Stranger Than Fission". This is a humorous outtake featuring the scene from the last battle in the game.
Get the indicated number of Skill Points to unlock the corresponding reward:
Successfully complete the indicated task to unlock the corresponding skin and/or item(s) in Online mode:
Bedroll 2, Pouches, Pouch (Fanny Pack): Reach level 34 - Captain status online
Beret, American Camouflage Uniform: Reach level 13 - Gunnery Sergeant status online
Black Ops skin: Successfully complete Campaign mode on the Superhuman difficulty setting
Black Ops skin with skull head: Successfully complete Campaign mode on the Superhuman difficulty setting with all Skill points
British Brick Uniform, Grenade Pouch, Leather Packs: Reach level 07 - Corporal status online
British Camouflage Uniform, Knife, Head 10: Reach level 58 - Supreme Commander status online
British Goggles, Radio, Binoculars: Reach level 16 - Staff Sergeant status online
Camouflage Helmet, Leather Backpack, Back Holster: Reach level 43 - Colonel status online
Cartwright skin, Leather Pouch, Canteen: Reach level 55 - General status online
Chest Pouches, Head Pouches, Head 5: Reach level 25 - Sergeant Major status online
Cloven skin: Register on http://myresistance.net and look at your profile for an online code specific to your game
Commando Body, Commando Standard Uniform, Head 4: Reach level 19 - 1st Class Sergeant status online
Commando Camoflauge Uniform, Belt knife, Backpack: Reach level 22 - Sergeant Major status online
Commando Leather Uniform, Chest Radio, Shirtless skin: Reach level 40 - Lieutenant Colonel status online
Head 6, British Desert Uniform, VTOL Pilot skin: Reach level 31 - Lieutenant status online
Head 7, British Helmet, Backpack: Reach level 37 - Major status online
Head 8, Canteen 1, Radio: Reach level 46 - Brigadier General status online
Head 9, American Helmet, American Arctic Uniform, Canteen: Reach level 52 - Lieutenant General status online
Mechanic skin: Get all Skill points in Campaign mode
Medic Helmet, Bedroll 1, Chute Pack: Reach level 28 - Sergeant Major of the Army status online
Nathan Hale skin, belt packs, shovel, backpack: Reach level 60 - Supreme Commander (3 PIPS) status online
Pouches, Medic Helmet 2, Head 3: Reach level 10 - Sergeant status online
UK Solider Body, British Green Uniform, Canteen 2: Reach level 04 - Private First Class status online
US Solider Body, Head 1 and 2, Small Helmet, American Standard and Dirty Uniforms: Reach level 01 - Private status online
Winters skin, American Advanced Uniform, Hip Bag: Reach level 49 - Major General status online
Successfully complete the indicated task to unlock the corresponding number of Skill Points:
General
York
Grimsby
Manchester
Nottingham
Cheshire
Somerset
Bristol
Bracknell
London
Thames
Tower
Successfully complete the indicated task in Online Multiplayer mode to earn the corresponding medal. Press L1 or R1 at the character stat screen to view your currently earned medals.
Use the shotgun with the double barrel shot, then quickly take the L23 Fareye and shoot the head. This works best against tall targets.
Shoot a Chimera in the crotch to deal extra damage.
When going after Crawler Pods, put one Sapper Mine in the middle of the pods. Use the alternate fire on the gun and it will blow most, if not all, of them up.
To kill Cray Jacks, use the shotgun.
To kill Hardfangs, use grenades.
To kill Howlers, the shotgun works well, but circle around them because it takes a few shots to kill them.
To kill Hybrids (and Advanced Hybrids), shoot off the tubes coming from the cooling unit on their back and into their arms. This may be difficult, but they die much quicker this way.
To kill Leapers and Rollers, shoot at them with the Arc Charger, then use its Ion Burst.
To kill Menials, hit them with your gun. This will kill them quickly and you do not have to waste bullets.
To kill Slip Skulls, use the Bullseye Tag and hit them. After that, keep shooting.
To kill Steel Heads, shoot them in the head a few times.
To kill Titans, tag them on the head with the Bullseye and keep shooting.
To kill Titans easily, get behind it. Take out your shotgun and shoot at the wires on its back. When you are behind it, it cannot see you. You can kill it without getting hurt.
To kill Widowmakers, tag them with the Bullseye, then find some cover and just keep shooting.
To kill Angels, use the same strategy as with the Widowmaker, but you must keep moving because they throw a spear-like weapon at you that creates harmful gas.
When in the Hybrid skin, press L2 to turn off your cooling apparatus. This enables you to sprint and see through walls. However, if you overheat, you will slowly lose health.
While running in any direction in the Human skin, quickly tap L2 to sprint. When running, the reticule will disappear.
Do not use the L11-2 Dragon when in the Hybrid skin because the weapon heats up when it fires and damages the Hybrid cooling apparatus; this causes you to lose health.
If you see a cluster of Crawler Pods, get out the Sapper and cover them with Sapper Mines, then approach. When the Pods hatch, the mines will explode instantly killing all the crawlers. If there are any survivors, force them to go through a narrow choke point (like a door) and shoot them with a gun like the M5A2 Carbine.
At the beginning of the level, go out of the gate, then to your left. Take another left at the next turn. In the little garden area by the bench there is a gnome.
If you look at the LU-P Lynx, you will notice that the driver's seat is on the left. However, British vehicles should have the driver's seat on the right.
There is a Morse Code message on the pause menu in each level as well as from messages from some of the dead MIBs (Men In Black). The following is a list of the decoded messages, which give you some insight into who the MIBs are and their goals:
York
Grimsby
Manchester
Nottingham