As a complement to my Money Crashers article on the joys of tabletop gaming, I've also done one on how to enjoy electronic games on a budget. I've checked lists at gaming publications to find the top-rated games in different categories - war games, fantasy games, MMORPGs - that you can play for free (although some of them are only trial versions, and others charge for in-app purchases).
I've also added a section on my favorite type of computer game, old-fashioned text adventures (like Zork). There's a huge number of these available for free online, they don't require a sophisticated computer setup, and the best ones are, in my opinion, even more compelling than the best graphical games. Sure, I know computer graphics are more realistic than ever, and I know we're on the verge of a revolution in virtual reality that will make it possible to experience the game world even more fully—but I still maintain that there are some things a well-written story can do that no visual experience can ever match. In an IF (interactive fiction) game, you can experience not only sights and sounds, but also smells, tastes, and more importantly still, thoughts and feelings. How can graphics ever do that?
If you've never tried it before, I urge you to give just one of these text adventures a try and see for yourself. Andrew Plotkin's The Dreamhold is a good one for new players, but any of the games in this "starter pack" list could be a good choice.
And to see the rest of the game choices, check out the full article: Cheap Computer Games – Best Free & Affordable Options