So in keeping with the idea of enjoying games that don’t cost you a single cent to play… Check out Aethora. It’s a free-to-play, tactical/strategy, browser based RPG.
You make your own party of adventurers and set out on missions. If you’ve played Final Fantasy before, you’ll get the idea. It’s more involved than the old Final Fantasy games I remember on my ancient Nintendo (and GameBoy), but it’s not hard to get into.
The game can be played on your own time. Since it’s turn-based, you can get up and walk away at any time. If you close your browser and come back later, it’s right as you left it. Pretty cool right? So why are you still reading this? Go play.