Standard Operating Brocedure

Standard Operating Brocedure is an achievement in Halo: Combat Evolved Anniversary and Halo: The Master Chief Collection. It is awarded for completing any campaign level cooperatively on Normal difficulty. It is worth 10 Gamerpoints. If a player earns the Brovershield or Brohammer achievements without this achievement already earned, they will be unlocked together.

In the original Halo: CE Anniversary is represented by two MA5B assault rifles over the difficulty shield. In The Master Chief Collection it is represented by an image of Zanzibar.

Trivia
The achievement is a play on the term "Standard Operating Procedure."