Complete procedure describe here: https://www.coh2.org/topic/108965/procedure-how-to-get-coh-3-pre-alpha
You can pre-load the game right now on Steam. 11.7GB to download (21.1GB on the disk).
Multiplayer Pre-Alpha content:
- 2 factions: USF and Wehrmacht (no mirror matches right now) ;
- 4 battlegroups : USF Airborne, USF Armoured, German Breakthrough and German Luftwaffe ;
- 1v1 and 2v2 ;
- PvP, Co-op vs AI and Solo vs AI ;
- Victory Points or Annihilation ;
- Automatch and custom game ;
- 4 maps:
- One 1v1: Twin Beaches ;
- Three 2v2: Pachino Farmlands, Torrente and Aere Perennius ;
- One 1v1: Twin Beaches ;
- Tactical pause enable vs AI ;
- No Italian units but Relic will be showing off those units in game next year (2022) ;
For more information Relic published: Multiplayer Pre-Alpha: Frequently Asked Questions & Known Issues.
They talk about it:
Mithiriath 
Relic Entertainment
cblanco ★ 
보드카 중대 
VonManteuffel 
Heartless Jäger 
