@znurre granted, #Valve isn't #Nintendo and they'd likely send you a cease-and-decist before any suing, plus they likely understand that #developer #documentation is more #advertising than harm to them.

• After all, #Steam has such a huge fanbase, #IndieDevs get bullied into releasing on Steam.
• It's in Valve's best interest if #Games fully utilize the #SteamAPI & #SteamworksAPI for all the nice features ranging from #SteamCloud saves to #SteamWorkshop and #Matchmaking.
  • Because all the competitiors (#GOG & #EpicGames) suck at this really hard, with #EPIC actively antagonizing #LinuxGaming despite owning the entire toolchain to make it work!