First of all, pirate all you want. I pirated games my entire childhood, and now that I have a job and a disposable income, I'm filling in my catalogue with games I loved as a little boy.
Second of all, there are tons of good games you can get for very, very cheap. Check out someplace like
https://www.cheapshark.com/Looking at it at the moment of writing, I can see you can get Metro 2033 for 99 cents, Dishonored for $1.99, Homeworld for $3.49, Frostpunk for 3 bucks. These are all amazing games available at a 90% discount. Have you played literally every good game of yesteryear? I doubt it.
But you don't have to do that. You can just pirate, it's literally fine.