Last updated: 1 July 2026

Halo: Campaign Evolved Co-op Guide — Crossplay & Cross-Progression

This is the first time the Combat Evolved campaign has supported proper modern co-op, and Halo Studios built it around crossplay from the ground up. Here's exactly how many players you can run with, which platforms can play together, what happens to your progress if you switch devices, and where split-screen still works.

01How Many Players & Drop-In/Drop-Out

• Up to 4 players can play the full campaign together online — a first for this specific campaign, which previously topped out at 2-player co-op in earlier collections.
• Drop-in/drop-out is supported, so a friend can join your session mid-mission or leave without ending the game for everyone else.
• Progress made in a co-op session applies to the host's save in the usual Halo way — check who's hosting before starting a mission if you care about which save file records your progress.

02Crossplay Across Every Platform

• Full crossplay is supported across Xbox Series X|S, PC (Steam and Windows/Microsoft Store), and PlayStation 5 — your squad doesn't need to be on the same platform.
• This means a PS5 player, an Xbox player, and two PC players can all be in the same 4-player campaign session together.
• Crossplay is on by default for campaign co-op sessions; there's no separate multiplayer mode to configure it in, since this is purely campaign co-op rather than competitive matchmaking.

03Cross-Progression

• Your campaign progress, unlocks, and achievements sync across platforms as long as you're signed into the same account.
• That means you can start a mission on PS5, pick the same save back up on Xbox Series X, and continue on PC later without losing progress.
• This is separate from crossplay — cross-progression is about your own save following you, while crossplay is about playing with others regardless of their platform.

04Split-Screen: Console Only

• Split-screen co-op is available on Xbox Series X|S and PlayStation 5, supporting 2 players on one console.
• PC does not support split-screen — PC players need to play co-op online, either with each other or with console players via crossplay.
• You can combine local and online co-op: two friends playing split-screen on one console (say, PS5) can team up with two more players online — including PC players — for a full 4-player squad.