I've Got The Codes achievement in Gears of War 4

The Gears of War Series on Xbox

Gears of War 4 Update and Achievement Status

Gears of War 4 June 2018 Update Has Arrived

New Horizons achievement in Gears of War 4

so I'm trying to get all of the achievements for the original gears of war and a lot of them are multiplayer related and I was wondering if anyone could help me

Talk:Gears of War 3, Gears of War Wiki

TrueAchievements has reached 1 million users! To celebrate they have created an infographic full of stats from the site! : r/XboxSeriesX

Gears Tactics (2020) - MobyGames

CROSSFIRE: Sierra Squad PlayStation trophy list revealed

Sorry, That's Never Happened To Me Before achievement in Gears of War 4