Beat boss 1
Beat boss 2
Beat boss 3
Beat boss 4
Beat boss 5
Beat boss 6
Rebeat all bosses 3 times
Upgraded 6 skills
Upgraded 12 skills
Upgraded 18 skills
Upgraded 24 skills
Reloaded 25 bullets
Reloaded 100 bullets
Reloaded 250 bullets
Reloaded 500 bullets
Found 10 weapons
Found 50 weapons
Found 100 weapons
Found 200 weapons