Ranks in Halo Wars are obtained by accumulating score from private Matchmaking games on Xbox Live.

The Service Record shows the players current rank, score and how many more points the player needs to rank up. The player's rank is also visible as an icon next to their gamertag when in a game lobby, post game screen and other areas.

There are eight ranks available in Halo Wars. The player starts as Unranked, and then is promoted to Recruit upon completing their first Public Matchmaking game. There are two bonus modifiers that can boost the players score by a percentage. To earn the bonus, the player must complete a Private Matchmaking game and not disconnect. If the player wins, they receive an additional 90%. If the player loses, they still get an additional 70%. If the player's out of the game early (The player gets defeated) and wants to leave, he or she will still receive the 85% bonus.