Full list of all 45 Gears POP! achievements worth 1,000 gamerscore. It takes around 1000 hours to unlock all of the achievements on Windows.
Upgraded a Pin to max level
Reached Max Player Level 20
Earned 2,000,000 Coins
Defeated 100,000 pins, won 1000 Versus Battles, reached highest League and cleared 1000 Horde Waves
Spent 100,000 Power in any multiplayer mode
Cleared 500 Horde Waves
Played 1000 Battles in any multiplayer mode
Played Horde with 20 different allies
Got promoted to the highest League
Reached Player Level 10
Cleared 250 Horde Waves
Earned 200,000 Coins
Played 500 Battles in any multiplayer mode
Reached the first League
Won 5 Consecutive Versus Battles
Won 100 Versus Battles without losing any of your Outposts
Used Marcus Fenix to capture 6 different pieces of cover in a single Versus Battle
Killed the enemy Leader with the Hammer of Dawn in Versus
Collected 20 new Pins from Gear Packs
Captured 1000 pieces of cover in Versus
Earned 20,000 Coins
Killed 50 enemy Pins with Carmine's Shotgun Blast skill in Versus Battles
Got promoted in Arena or League 3 times
Destroyed 10 enemy Outposts with Kait Diaz in Versus
Reached Player Level 5
Cleared 50 Horde Waves
Played 25 Fortification Pins in Versus
Won a Versus Battle with a Squad consisting of only Common rarity Pins
Upgraded a Pin 10 times
Defeated a Boss in Horde
Won a Versus Battle where you captured all available cover positions
Upgraded a Pin 3 times
Got promoted in Arena or League once
Won a Versus Battle without capturing cover
Named one of your Squads
Played 10 Battles in any multiplayer mode
Killed 5 Pins at once with a single Frag Grenade in Versus
Upgraded a Pin
Played 150 Troop Pins in Versus
Won a Versus Battle 3-0
Played 25 Projectile Pins in Versus
Won a Versus Battle without losing any of your Outposts
Won a Versus Battle within 2 minutes
Collected a new Pin from a Gear Pack
Completed the Tutorial