Full list of all 181 Gears 5 achievements worth 2,500 gamerscore. It takes around 1000 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 68 achievements worth 1,000 Gamerscore, and there are 7 DLC packs containing 113 achievements worth 1,500 Gamerscore.
Completed a Versus match with a team of four Level 5 Gears Allies
Reached Level 5 with an ally in Gears Allies
Won 25 Ranked matches in one Competitive Season
Insane Campaign, Mastered Horde & Escape Launch Maps & Characters, 20 Re-ups, General in Tour
Completed a Launch Hive on each difficulty (The Hive, The Descent, The Gauntlet or The Mines)
Completed an Act of Campaign in 3-player co-op
Fully upgraded Jack's Abilities and Passives in Campaign
Killed an enemy with every Relic Weapon in Campaign
Used Jack's Cloak ability to cloak and executed 3 enemies before de-cloaking in Campaign
Scavenged supplies from all fallen Condors in Act 2 and Act 3
Acquired all of Jack's Ultimate upgrades in Campaign
Collected all Campaign Collectibles
Used Jack's Fetch ability to acquire each Heavy Weapon in Campaign
Equipped 3 Relic Weapons at one time in Campaign
Used Jack's Shock Trap ability to shock 6 enemies at once in Campaign
Used Jack's STIM upgraded ability to revive a DBNO friendly in Campaign
Got a kill with a Hijacked Pouncer, Warden, Stump and Elite Hunter in Campaign
Got a kill with ricochet bullets using Jack's Barrier Ability
Completed all Acts of the Campaign (Any difficulty)
Completed all Acts of the Campaign on Insane
Got back to the New Ephyra wall
Planted the last beacon in the Old Ephyra ruins
Survived the Kraken fight
Assembled the UIR Hammer of Dawn rocket
Secured the UIR rocket
Secured the UIR satellites
Killed the Matriarch
Used the Comm Towers to locate the hidden facility
Opened the old COG gate in Kadar Valley
Found a way into New Hope
Saved the Riftworm village
Headshot the Swarmak at the theatre
Completed an Act of the Campaign as playable Jack (any difficulty)
Reinforced Carmine at the Plaza
Reached Character Level 15 with Infiltrator, Demolitions, Mechanic, Veteran, Marksman and Jack
Inflicted 9000 damage in Escape while 3 Ultimate Abilities were active
Reached the rank of General in Tour of Duty
Completed an Escape Hive without firing a shot on Master Difficulty
Reached Character Level 15 with Tactician, Anchor and Blademaster Class
Switched characters in an Arcade match and killed an opponent who previously killed you
Won 5 matches of Arcade
Completed 5 Matches in a Competitive playlist
Reached Character Level 15 with Infiltrator, Demolitions, Mechanic, Veteran, Marksman OR Jack
Used Jack's Flash ability to stun 3 enemies at once in Campaign
Upgraded Del's New Best Friend
Launched the Rocket
Reached Character Level 15 with either Tactician, Anchor or Blademaster Class
Reached the rank of Captain in Tour of Duty
As a team, collected Power from all 4 Power Taps within one wave of Horde
Reached the rank of Lieutenant in Tour of Duty
As Jack, converted one of each weapon to Power using the Forge in Horde
Completed 5 Escape Hives as each one of Mac, Lahni and Keegan
Played a match of Arcade
Executed 100 Rejects (any mode)
Reached the rank of Sergeant in Tour of Duty
Completed a Featured community built Escape Hive
Re-upped!
Reached the rank of Corporal in a Tour of Duty
Beat 50 Consecutive Waves of Horde (any difficulty)
Created and published an Escape Hive
Completed 3 Objectives for Tour of Duty in a day
Made a new Ally in Gears Allies
Passed through a refuge shower with 3 Hivebusters in the same shower cubicle
Got 5 kills while inside Hivebuster Venom
Killed a Sire while it's kidnapping a teammate (any mode)
Got a kill with 3 Perks active in Horde
Completed Boot Camp
Kill a Boss in Horde while all 5 players have active Ultimate Abilities
Re-upped 30 Times
Killed 200 enemies using the Silverback in Horde
Escaped all Operation 3 Hives on Experienced Difficulty or Higher
Mastered an Operation 3 Escape Hive and Horde Map
Escaped a Hive with a team of COG Soldier, Lizzie Carmine, Clayton Carmine, Baird or Cole
Re-upped 20 Times
Completed a Versus Match on Allfathers Arena, Lift, Mid, Boxes, Nethercutt, Pit & Core
Won a Versus round on every customized map piece in Allfathers Arena (9)
Won a Match of Arcade Blitz with the most Points earned in a Ring
Won a match of Gridiron and kept your opponents scoreless
Completed a Match of Free For All, Arcade Blitz and Gridiron
Scored a Touchdown with the Flag in Gridiron
Won a Match of Arcade Blitz where the opposition team is within 25 points of winning
Won 10 Competitive Matches of 2vs2 Gnashers
Executed both members of the enemy team within a round of 2vs2 Gnashers
Were 10 kills behind the leader of a Free For All round, then came back to win
Placed first in a Match of Free For All
Defeated an opponent with every Pickup Weapon in a single Free For All Match
Defeated 10 different opponents in a Free For All Match
Completed 50 Waves of Horde with Mac, Keegan and Lahni in your squad
Escaped all Operation 2 Hives on Experienced Difficulty or Higher
Defeated the Matriarch in Escape using the Relic Dropshot
Used the Scrubber Room to slow down the Venom in Escape
Acquired Character Skins for 3 different post launch Characters
Acquired 30 Skill Cards of Level 3 or above
Reached Character Level 15 with Combat Medic, Pilot, Gunner, Robotics Expert or Brawler
Completed 50 Consecutive Waves of Horde with Lizzie Carmine, Clayton Carmine, Baird or Cole
Re-upped 5 Times
Escaped a Hive with Lizzie Carmine, Clayton Carmine, Baird or Cole
Mastered an Operation 2 Escape Hive and Horde Map
Re-upped 10 Times
Completed a Match of Arcade Blitz as a Hero or Villain from Operation 2 or Operation 3
Killed 25,000 enemies in Versus
Got 12,500 assists in Versus
Dealt 30,000,000 damage in Versus
Re-upped 40 Times
Mastered All Featured Horde Maps from Operation 4
Completed a Versus match on Reactor, Blood Drive & Checkout
Got a Denial on an Enemy while they were inside your Endzone with the flag in Gridiron Mode
Unlocked a reward in any Competitive playlist
Escaped all Operation 4 Hives on Experienced Difficulty or Higher
Completed all Year One Escape Hives
Acquired any Weapon from the Fabricator in Escape
Mastered an Escape Hive and Horde Map from Operation 4
Completed 12 consecutive waves of Horde Frenzy with Baird & Paduk in your Squad
Won a Match of Horde Frenzy on Master Difficulty
Won a Match of Horde Frenzy (any difficulty)
Completed a Featured Horde Map from Operation 4
Woke-up in the Med bay while escaping a Hive in Escape
Escaped a Hive with Paduk
Won a match of Gridiron with an Operation 4 Hero or Villain
Killed an enemy using a planted Grenade in Gridiron mode
Reached Character Level 15 with 10 Characters
Deal 100,000,000 damage in Versus
Kill 100,000 enemies in Versus
Get 50,000 assists in Versus
Killed 100 enemies under the effect of Nomad's Fear ability, as Nomad Class, in Horde or Escape
Killed 100 enemies using Brawler Class Flame Ability & Flame Skill Cards in Horde or Escape
Killed 100 enemies using Gunner Class Reflect ability in Horde or Escape
Eliminated 100,000 enemies in Horde or Escape
Dealt 60,000,000 damage in Horde or Escape
Eliminated 25,000 enemies in Horde or Escape
Dealt 200,000,000 damage in Horde or Escape
Completed 60 Waves of Horde Frenzy on Insane or Higher
Reached Re-Up 60
Reached Legend 25 in an Operation
Completed a match of Horde Frenzy on Atrium
Won 5 matches with the Vrol character
Won 5 matches with Bernie COG character
Completed a match of Horde Frenzy on Command
Completed a match of Horde Frenzy on Turbine
Won 10 matches of Execution
Won a Versus match on Ritual
Did 400,000,000 damage in Horde or Escape
Won a Versus match on Ephyra
Won a Versus match on Tomb
Won 10 matches in Versus Events
Won a Control and/or KOTH match on 10 different maps
Reached Re-Up 50
50 Re-Ups, Inconceivable Campaign, Master All hives & Horde Maps , All Classes at Level 20
Completed all chapters in Ironman Mode on Experienced difficulty or above
Completed all chapters in one Act while Batista as Marcus is enabled
Completed all chapters on Inconceivable difficulty
Completed a chapter of Campaign while using a Custom Skin
Killed 10 enemies using a weapon with a Custom Skin
Maxed out each of the Anchor, Gunner, Pilot, Veteran, Brawler classes
Collected first Heroic skin
Won a Ranked match in each of Regency, River, Nexus, Clocktower, and Gridlock
Got 1000 points in a Competitive match from ring breaks
Got 2000 points in a Competitive match from eliminations
Beat the Gold Time in a Featured Escape
Collected 20 Epic character skins
Got 100 eliminations in Nexus
Completed a Versus match in each of Regency, River, Nexus, Clocktower, and Gridlock
Got an elimination with the Scorcher
Own 360 weapon skins
Own 50 character skins
Reached level five on any one Assault, one Tank and one Support
Collected all Campaign Collectibles in the Hivebusters DLC
Killed 50 enemies using Lahni's Electroblade Ability in the Hivebuster Campaign Expansion as Lahni
Found all Character Ability upgrades in the Hivebusters DLC
Completed all Chapters of the Hivebusters DLC on Insane
Killed 50 enemies through your Barrier Ability in the Hivebuster Campaign Expansion as Mac
Activated Keegan, Lahni and Mac's Abilities in the Hivebuster Campaign Expansion
Completed all Chapters of the Hivebusters DLC (any difficulty)
Defeated the Wakaatu
Opened up the Spirit Walk on Pahanu
Saved Hana from the Snatcher
Activated Resupply ability 25 times in the Hivebuster Campaign Expansion as Keegan
Arrived on Weilehi
Escaped the Swarm-infested Sanctum
Arrived at Sanctum to infiltrate the Heart of the Hive
Completed the Hivebusters DLC in 3-Player Co-Op (Scorpio squad, dupes not allowed)