Which is honestly meaningless but very convenient for US narrations. There were also older de facto constitutions, which are usually forgotten like the Henrician Articles of P-L Commonwealth. US constitution is famous because it was the one which was loudly proclaimed and imitated later.
*You must agree to the user licence and subscription fee. It is of course non mandatory but not agreeing results in lack of access to the application necessities.bat and eventual termination of the process life.exe. Enjoy!
Easy mode is in overwhelming most of cases just a few numbers change.
I would say making game harder is much more difficult and resource consuming, but most of it is, like many other comment noted, just cranking up those same numbers up.