Jak 3 (PS2)

Unlockables - Full list
These items are bought in the secrets menu after the indicated levels have been completed:

Bad Weather: 5 Orbs - Act 1-1
Big Head Mode: 3 Orbs - Act 1-1
Blaster Damage Upgrade: 6 Orbs - Act 1-9
Dark Jak Invisibility: 25 Orbs - Act 3-11
Fast Movies 5 orbs - Act 1-1
Hero Mode 5 orbs, - beat the game
Higher Blaster Gun Ammo Capacity: 4 Orbs - Act 1-17
Higher Peace Maker Ammo Capacity: 4 Orbs - Act 2-19
Higher Scatter Gun Ammo Capacity: 4 Orbs - Act 1-17
Higher Vulcan Fury Ammo Capacity: 4 Orbs - Act 1-24
Invulnerability: 100 Orbs - Act 3-11
Jak 3 Model Viewer 2 Orbs - Act 3-11
Jak And Daxter Models: 2 Orbs - Act 1-24
Jak II Model Viewer 2 Orbs - Act 2-25
Mega Scrap Book: 2 Orbs - Act 3-11
Mirror World: 5 Orbs - Act 1-1
Peace Maker Increased Radius: 6 Orbs - Act 2-19
Rachet And Clank Gun Courses: 6 Orbs - Act 2-12
Scatter Gun fire rate upgrade: 6 Orbs - Act 1-9
Scene Player Act 1: 2 Orbs - Act 1
Scene Player Act 2: 2 Orbs - Act 2
Scene Player Act 3: 2 Orbs - Act 3
Scrap Book: 2 Orbs - Act 1-24
Slow Movies: 5 Orbs - Act 1-1
Small Head Mode: 3 Orbs - Act 1-1
Toggle Jak's Goatee: 2 Orbs - Act 1-1
Unlimited Ammo: 50 Orbs - Act 3-11
Unlimited Dark Jak: 50 Orbs - Act 3-11
Unlimited Light Jak: 50 Orbs - Act 3-11
Unlimited Vechicle Turbos: 30 Orbs - Act 2-25
Upgrade Vechicle Toughness: 15 Orbs - Act 2-14
Vulcan Fury Damage Upgrade: 6 Orbs - Act 1-17