How to remotely reset the cache of users who have visited a specific site?

Question

CMS

We created an online game that caches data in order to optimize further launch with a weak Internet. The game is implemented in HTML5 via C2. Updated the game, namely a number of important functional things. A couple of days have passed, some users log into the game and see the old version, send us screenshots.
How can I update/reset user cache remotely?
Tried:
1. to prescribe versions for calling key files in the format ?v=102.
2. change the file extension from index.html to index.php
3. change the file name from index.php to index2.php adding a setting to the domain to start the new name.
nothing helped. You cannot change the domain directory.
what other options are there?

Answer 1

Colleagues recommended to prescribe the headers, as far as I know the game takes them from the cache.
header("Cache-Control: no-cache, no-store, must-revalidate")
header("Pragma: no-cache")
header("Expires: 0)
there is another redirect option, but I think it's not the best solution.