Nice Work Dawg!
Nice Work Dawg! is an achievement in Halo: The Master Chief Collection. It is unlocked by earning a total of 2,500 Assist medals in multiplayer; this includes both matchmaking and custom games. Spartan Ops missions are considered custom games. The achievement is worth 5 gamerpoints.
Players attempting to unlock the achievement should avoid playing Halo 3 multiplayer matches, as it is the only game in the Collection which does not award the Assist medal.