How can I use the word "obsolete"?

Some sentences with obsolete:
My old printer is obsolete and I can't get replacement parts.
Automation has obsoleted many factory workers.
Now that the new operating system is out, the old Windows XP seems so obsolete.
Placing your questions in the wrong category is quickly becoming an obsolete idea.

I have never known obsolete to be made into obsoleted. so obsolete is correct.
If you want an alternative word you could say "this game is outdated"

intresting