I admit I know nothing about tier 2 as I know nothing about C++ at all! So I'm just wondering, apart from the language differences, what commands does tier 2 have that tier 1 does not (I think somewhere I read that you can hide the cursor in tier 2 but not tier 1)?

To Hide cursor in tier2 you use a Windows sdk command, not an agk command.

so basically there are no extra agk specific commands in tier 2.

The T1 and T2 command sets are identical. What you write in one you can write in the other without learning/unlearning commands. The only exception in terms of command count is that in T2 you can also tap into the raw commands of the AppGameKit engine sometimes (mainly used for internal house-keeping). They are not documented as they are not part of the concept of 'write once', but they come in handy for very specific purposes when managing the AppGameKit Player. The bottom line is that you can learn all the commands in BASIC, and when/if you move over to C++, all the same commands will be there to welcome you

How can we see at least a list of these Raw internal commands?

Wouldn't they be in the Header files?

But header files would contain ALL commands right, not the raw agk engine ones

I'm not a C++ programmer, I just thought that was an idea to check. You could get the header files, remove all standard commands, and see what is left.