Use the command download_depot 570460 570461 8597203258519743951 .
Since Laser League is no longer officially supported, you might enjoy these active, free-to-play competitive games available on Steam or the Epic Games Store :
A free platform fighter with a massive active community. Download the Epic Games Launcher - Epic Games Store
The core gameplay mechanics—using classes like to eliminate opponents—still work in local "couch" co-op mode or against AI bots. 2. Steam "Depot" Workaround