Infinite grenades:
To unlock infinite grenades, earn 56 medals in story mode.
Trophies:
Bronze trophies
Amusement Park – Complete Mission 6 on any difficulty.
Candy Shop – Complete Mission 3 on any difficulty.
Death From Above – Destroy 50 vehicles and destroyable objects on the flying level without dying.
Disco Inferno – Complete Mission 5 on any difficulty.
Explosive – Unlock all special weapons.
Fly Poster – Collect all 5 posters on any level. This can also be achieved by assisting another player in Coop.
Flying High – Score air time from a single character for more than 5 seconds.
Get In My Car – Complete Mission 2 on any difficulty.
Get In Our Car – Complete Mission 2 on any difficulty as a member of G-Unit.
Got It Done – Successfully complete one scenario.
Got Paid – Complete all missions on Easy or better difficulty level.
Gotta Make It To Heaven – Complete Mission 9 on any difficulty.
Gunz Come Out – Complete Mission 7 on any difficulty.
Hit and Run – Run over a foot soldier in a driving section.
I’ll Still Kill – Complete Mission 8 on any difficulty.
I’m Supposed To Die Tonight – Complete Mission 1 on any difficulty.
Massacre – Kill 5 enemies fast enough to score a 5 kill combo.
Not Bulletproof – Die on Easy difficulty.
Our Amusement Park – Complete Mission 6 on any difficulty as a member of G-Unit.
Our Candy Shop – Complete Mission 3 on any difficulty as a member of G-Unit.
Our Disco Inferno – Complete Mission 5 on any difficulty as a member of G-Unit.
Our Gunz Come Out – Complete Mission 7 on any difficulty as a member of G-Unit.
Packin’ Heat – Unlock all pistols.
Point Blank – Unlock all close combat weapons.
Ramping Up – Complete any of the ramp scenarios in a driving section.
Rifled – Unlock all assault weapons.
Savior – Revive a coop player.
Sharpshooter – Kill an enemy by shooting a rocket or grenade out of the air using Gangsta Fire.
Straight To The Bank – Complete Mission 4 on any difficulty.
Target Practice – Shoot all 5 targets on any level. This can also be achieved by assisting another player in Coop.
Up Close – Perform a counter kill.
Wanna-be – Obtain 15 or more Silver Badges.
We Gotta Make It To Heaven – Complete Mission 9 on any difficulty as a member of G-Unit.
We’ll Still Kill – Complete Mission 8 on any difficulty as a member of G-Unit.
We’re Going Straight To The Bank – Complete Mission 4 on any difficulty as a member of G-Unit.
We’re Supposed To Die Tonight – Complete Mission 1 on any difficulty as a member of G-Unit.
Silver trophies
Black Belt – Unlock all counter kill packs.
G-Unit – Complete all missions on any difficulty as a member of G-Unit.
Gangsta – Complete all missions on Normal or better difficulty level.
Hardcore – Obtain 15 or more Gold Badges.
Regular – Obtain all Silver Badges.
Scenario Master – Successfully complete 50 scenarios.
Tooled Up – Unlock all weapons.
Gold trophies
Bulletproof – Complete all missions on Hard difficulty level.
Millionaire – Have 1,000,000 dollars in the bank.
O.G. – Obtain all Gold Badges.
Platinum trophy
100% Clear – Earn all Bronze, Silver and Gold trophies.