Halo Wars 1.5

Not rated yet

Halo 3 comes to Halo Wars: DE: the Master Chief, Mongoose, Mantis, Falcon, Frigate and more, and you can play the Chief yourself.

ProtossJoined October 2026

MultiplayerSame world · up to 6 players, in the game's own lobbies

How to join in Halo Wars' Multiplayer menu the host creates a custom game and invites friends through Steam; put the humans on one team and AI on the other, then start. Everyone needs this same version of Warthog Command (press Play in Melty once first so it's built).

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About

Halo Wars 1.5 is a Halo Wars: Definitive Edition mod that brings Halo 3 / MCC into the RTS. This is still really buggy, fixes are to come in the coming weeks.

New units (balanced against Halo Wars' own):

Master Chief: the first of your three Spartans, trained at the Barracks (and again if he falls)
Mongoose (Rocket Rider upgrade), Mantis, Broadsword, Falcon (Troop Bay upgrade), Mammoth, UNSC Frigate
Paged Barracks / Vehicle Depot / Air Pad menus: slot 0 flips to page 2 for the new units and upgrades
500 population cap
Master Chief does get stuck within the base, workarounds so far are: take control of him and walking out or making an Elephant/Mammoth and spawning him there.

First person (single player): select the Chief and press Tab. You get Halo 3's SMGs, turret or Spartan Laser, can drive your vehicles or hijack enemy ones with E, and can let the army AI run your base (T).

Join through the game: in Halo Wars' Multiplayer menu the host creates a custom game and invites friends through Steam; put the humans on one team and AI on the other, then start. Everyone needs this same version of Warthog Command (press Play in Melty once first so it's built).

Needs: Halo Wars: Definitive Edition, Halo: The Master Chief Collection and Halo 3 Mod Tools (Steam). The first Play builds the mod on your PC from your own copies (a few minutes); nothing from the games is in the download.

Unofficial fan mod, GPL-3.0. The full source is in the download's source folder.