Monopolized

Monopolized is an achievement in Halo: The Master Chief Collection. It is unlocked by completing the Halo 2 campaign on Legendary in under 3 hours.

The 3 hour time limit is calculated as the sum of the player's best times on each level on Legendary on either solo or co-op; players can view their best times on their Halo Waypoint service record. This is arguably the most difficult of the Legendary speedrun achievements, as the game's par times actually total 3:30; the only game in the collection with a sum greater than 3 hours.

Trivia
This achievement is named after Halo 2 speedrunner Mr Monopoli.