Monopolized - Achievement - Halopedia, the Halo wiki
Monopolised achievement in Halo MCC
Steam Community :: Guide :: Halo 2 & 2A: Achievements
Prophet of Ark on Twitter: "Halo 2 Completed in under 3 hours! Monopolized Achievement Unlocked! A thank you to @li_gabby_il for helping finishing a couple missions! #Halo | #Halo2 https://t.co/7RJQcsvN6q" / Twitter
Halo 2: Monopolized achievement not unlocking? (Beat Halo 2 on Legendary in under 3 hours) : r/halo
New Halo: The Master Chief Collection Patch Is Live With Matchmaking and Party Improvements - MP1st
Halo: The Master Chief Collection (Xbox One / Xbox Series X|S / Windows 10+) @ Gamertag Nation
Halo: The Master Chief Collection Day-One Patch Adds 50 More Achievements | Cinemablend
Achievements - Halo: The Master Chief Collection Guide - IGN