UDK’s Steam integration (via OnlineSubsystemSteamworks) is pretty old and missing a lot of features.
Has anyone written any DLL’s to make calls to Steam.
I’ve still never used DLL binds in my project, but they seem like they would be very useful.
Have you tried the steam_api.dll that Steamworks gives you? You get it from your Steamworks download location steamworks_sdk_141\sdk\redistributable_bin, then copy that into your project’s binaries folder (overwriting the old version that UDK gives you). In one of your UnrealScript classes you dllbind it to get access to any new functions you want to use.