To unlock the Hyperbolean and Chameleon armour you must beat the game the indicated amount of times in Challenge mode.

Unlock Hyperbolean Armor Set.
Beat Challenge mode once. Unlock Chameleon Armor Set:
Beat Challenge mode twice.

To be able to defeat the final boss (Otto Destruct) you have to have four weapons.

1) The Optical Maser Array

2) Electro Rocket (with Shock and Lock-On mods)

3) Shield Barrier

4) PDA

When you have ALL 4 weapons you have to put up a shield and use the Optical Maser Array to lower his shield. Fire the Electro Rockets at him and keep doing this until he is defeated. If you run out of ammunition while you are doing this use the PDA.

Unlock R.Y.N.O:
The RYNO (which stands for 'Rip Ya a New One') can be purchased for $9,999,000 when you have defeated Otto Destruct.

Unlock Flaming Wrench:
When you wear ALL the Wildfire armour you will get a flaming wrench.

Unlock Freeze Wrench:
When you have defeated Otto Destruct enter Challenge mode and you will get a piece of the Hyperborean armour. Collect the full set and wear it and you will get a freeze wrench.

Collect the following sets to unlock the corresponding armour and the bonus effect that goes with it.

Unlock Wildburst:
Sludge Mk. 9 Helmet, Wildfire Torso, Gloves, Boots.

Unlock Ice II:
Crystallix Helmet, Hyperborean Torso, Gloves, Boots.

Unlock Shock Crystal:
Electoshock Helmet, Crystalix Torso, Gloves, Boots.

Unlock Fire-Bomb:
Mega Bomb Helmet, Torso, Wild Fire Gloves, Boots.

Unlock Stalker:
Wild fire Helmet, Chameleon Torso, Sludge Mk 9 Gloves, Boots.

Unlock Triple wave:
Wildfire Helmet, Electroshock Torso, Sludge Mk 9 Gloves, Boots.

You must successfully play 10 Online matches without dying to unlock the Dan skin for your Online account. The 10 matches do not have to be completed in a row.

Titanium Bolts Unlockables
Collect the following amount of Titanium Bolts to unlock the corresponding skin.

Unlock Troical Vacation Skin:
Collect 4 Titanium Bolts

Unlock Plundering Pirate Captain Skin:
Collect 6 Titanium Bolts

Unlock Ratchetzilla Skin:
Collect 6 Titanium Bolts


Skill Point Unlockables
Collect the following amount of Skill points throughout the game to unlock the corresponding effect. These cheats can be toggled on and off.

Unlock Big Headed Giant Clank:
Collect 1 Skill Point.

Unlock Big Headed Clank:
COllect 3 Skill Points.

Unlock Big Headed Ratchet:
Collect 5 Skill Points.

Unlock She's On Fire!:
Collect 7 Skill Points.

Unlock More Cowbell:
COllect 8 Skill Points.

Unlock Mirrored Levels:
Collect 10 Skill Points.

Unlock Super Bloom:
Collect 12 Skill Points.

Unlock Big Headed Enemies:
Collect 14 Skill Points.

Unlock Weapon Switching:
Collect 16 Skill Points.

Unlock Bolt Confusion:
Collect 20 Skill Points.

Unlock Hardcore Mode:
Collect 24 Skill Points.

Unlock Mooo!:
Collect 24 Skill Points.

Unlock Old Timey:
Collect 24 Skill Points.

Unlock Climb The Treehouse:
Collect 25 Skill Points.


Unlockable Secrets and Special Items:
To gain access to these go to the 'Specials' menu which is underneath the 'Pause' menu and toggle on or off whatever you want.