Full list of all 17 Brotherhood United achievements worth 1,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements on Xbox One.
Save 35 Bros
Kill 350 enemies
Throw 32 grenades
Pass through a mission without using grenades
Detonate 12 mines without taking damage
Save 15 Bros
Throw 12 grenades
Get 3 stars on any mission
Kill 100 enemies
Detonate 6 mines without taking damage
Reach the end of the first mission
Save 5 Bros
Kill 10 enemies
Detonate 1 mine without taking damage
Finish the tutorial
Rapid fire your good old gun
Throw 3 grenades