Steam updates its Season Pass policy to make it clear: no mystery boxes that don’t say what the DLC is and when it’s coming
Valve has updated Steam’s Season Pass policy to make it clear that developers selling one must “clearly communicate” what the DLC is and when it’s coming.
Source: https://www.vg247.com/steam-updates-season-pass-policy-must-say-what-dlc-is-and-when-coming