If you use this repack, consider:
The repack is stable, no crashes during 20+ hours of testing. Save games work. Multiplayer via LAN works. However, online matchmaking via Relic’s servers requires a legitimate Steam key – but you can use GameRanger or Radmin VPN for virtual LAN.
Modern Steam versions of Company of Heroes force you to use the "Relic Launcher" – a bloated login window that requires an internet connection even for single-player. You click the .exe, you are at the main menu. It is the "LAN Party" dream.
The Master Collection is comprehensive, typically featuring the following major components: