Complete the following tasks to unlock the corresponding GamerScore.

Infection - GamerScore 0:
Play with another infected player on Xbox LIVE.

Alpha Launch - GamerScore 10:
In Single-Player Refuelled launch from level 1.

Score More - GamerScore 10:
In Single-Player Refuelled score 250,000 points.

Squid Port Pacifist - GamerScore 10:
Complete level 3 in Single-Player Refuelled without using lasers or EMP's.

Power Hungry - GamerScore 10:
In Single-Player Refuelled upgrade your laser to full capacity.

Been through your Milky Way - GamerScore 20:
In Single-Player Refuelled play level 44.

Half Mill Man - GamerScore 20:
Score 500,000 points playing Multi-Player Refuelled over Xbox Live.

Survival - GamerScore 20:
In Single-Player Refuelled start from level 1 and reach level 10 without dying.

Retro Cyclist - GamerScore 20:
Complete ALL 16 levels in Retro.

Robo Rocket - GamerScore 20:
In Single-Player Refuelled build Robo Rocket.

Millionaire Man - GamerScore 30:
In Single-Player Refuelled score 1,000,000 points

You can stop now! - GamerScore 30:
In Single-Player Refuelled complete ALL 128 levels.