I would say claiming that a game supports a certain operating system and then banning players for playing it on the system is false advertising, especially if the game is paid.
The game is listed as not supporting SteamOS (Arguably the most popular linux distro for gaming right now) and incorporating drm that does not work on Linux, this is far from false advertising as I can see it.
https://store.steampowered.com/app/2073850/THE_FINALS/
I would say claiming that a game supports a certain operating system and then banning players for playing it on the system is false advertising, especially if the game is paid.
The game is listed as not supporting SteamOS (Arguably the most popular linux distro for gaming right now) and incorporating drm that does not work on Linux, this is far from false advertising as I can see it. https://store.steampowered.com/app/2073850/THE_FINALS/