Command list

[RhoSigma]

The wiki seems to be a duplicate of the help on the QB64 IDE.

Yes, but the opposite, the IDE actually pulls the text from the wiki and caches it into the internal\help folder, so it's available even if you're not online. This said, another valuable info for you is that you can force the IDE to update its internal help cache by using the "Update current page" or "Update all pages" commands from the "Help" menu.

As for your question for a simple syntax reference it should be sufficient to watch the IDE status area while typing your commands. It will give short messages, if something unexpected is typed and also complete sysntax specs for commands.