Gamma Bros 1.5 achievement guide & roadmap



No missable achievements (plus 6 unknown)

No guide has been started yet - please help create one as you play!

Sign in with Steam or Xbox to track your progress, and:

  • Search/sort/filter by type/missable/multiplayer
  • Hide unmissable story achievements (because you'll get them anyway!)
  • Focus on the missables
  • Checklists for "Get a kill with each type of weapon" type achievements
  • Click-to-zoom on guide images/media
  • Edit/contribute to guides

Triple Threat

Defeat The Triple Ship Boss

Brain Buster

Defeat The Brainiac Boss


Kill The Elusive Gold Head

Big Bro

Win on Normal

Little Bro

Win on Easy

Mega Bro

Win on Hard