Gamma Bros Achievements6 achievements
Little Bro
Win on Easy
14.5%
Epic
Big Bro
Win on Normal
15.4%
Rare
Mega Bro
Win on Hard
12.0%
Epic
Goldie
Kill The Elusive Gold Head
21.3%
Rare
Triple Threat
Defeat The Triple Ship Boss
31.5%
Uncommon
Brain Buster
Defeat The Brainiac Boss
23.7%
Rare
Overview