Here is the full list of all 24 Rangers achievements.
Wave 1 Completed
Wave 10 Completed
Wave 15 Completed
Wave 20 Completed
Wave 25 Completed
Wave 30 Completed
Wave 50 Completed
Wave 100 Completed
I found hide place :)
Show what you think about the reward
Somewhere in the deep forest :)
This is a bad camp
Go fast and safe
Fast as the wind
Skull found in Town
Skull found in Fortress
Skull found in Forest
Skull found in Canyon
Skull found in Railway station
Skull found in Crash site
Skull found in Mine
Skull found in Dead lake
Skull found in Escape
Skull found in Arena