toroca: These days, I don't really have any "must own" games, since my computer is so old and incapable of playing most modern titles. Once upon a time, though, my "must owns" would have included anything in the SimCity series before they ruined it in 2013, or anything in the Civilization series, before the first one to require an internet connection to activate, Civ V.
Nowadays, my "must own" list is more of a wishlist for whenever I manage to replace my ancient computer with something less ancient. Amongst others, if it is still available, I will probably acquire Cities Skylines and most of its DLC, and I would love to play Skyrim and whatever Elder Scrolls VI ends up being called. Skyrim is just a little bit beyond my current geriatric computer's abilities. Oblivion is one of my favorites though.
Looking at the number of games from the 90s or even 80s listed by people, and how few are released in the last 15 years or so, it really doesn't seem like an old computer would be a problem...
