I'd say the Half-Life series as well as the fan-game Black Mesa (especially after the release of Xen). I also like first-person puzzle games in general.
Also, this is kind of a grey area whether this is a game, more of a simulator really as there are no objectives or story (not even so much as an excuse plot), but No Limits 2, which is the program I've been using to build these hyper-realistic roller coasters, and rather than using buttons to place specific track sections like in Roller Coaster Tycoon, it uses B-spline curves.
For Windows and Linux, I really liked World of Goo. It's a puzzle game with very realistic physics and the goal is to use your blobs to reach a certain endpoint by building a way to get there out of them, such as bridges and ropes. If your structure isn't built with enough support, it can and will fall; if you overcompensate for stability you will run out of goo on the other hand. It actually gets very hard. The soundtrack is really good, especially songs like Tumbler, Screamer, Burning Man and The Red Carpet (though I prefer the in-game versions to the extended OST.)
For Mac, I liked Bugdom and would always play it at school when recess was indoors like 20 years ago. You play as this blue and green shelled bug, roll around, fly on dragonflies etc. but if you fly too high and try to skip parts of the level you get eaten by a bat. It's an early 3D platforming adventure that is sort of Mario-ish. If I recall, you have to rescue a bug captured by the bees or something and beat the king bee at the end. Other bugs and people walking around barefoot present a threat. It was really cool seeing the world as such a little thing.
Just look above you... If it's something that can be stopped, then just try to stop it!
Definitely Half-Life 2. My favourite in the Far Cry series was Far Cry 4, since it took everything that was good in Far Cry 3 and made it better. I do also like the Metro games.
I do also like Minecraft because of the creative aspect, survival is pretty fun though, even though I suck at it.
If you're on Firefox 70+, and you don't see the blur effect, go to about:config and enable layout.css.backdrop-filter.enabled and gfx.webrender.all For the best aesthetics, use Chrome, or with some settings, Firefox.
Colour scheme based on the awesome ViM theme, Gruvbox.
Terraria, Minecraft, Terraria, Sonic Adventure DX, 2, Heroes, Terraria, Forager, Terraria, Geometry Dash, Terraria, Mario and Sonic Fangames, Terraria, Indie Games like Undertale, Terraria, Skyrim, Terraria, Emulator Games and Terraria.
I used to love playing Yu-Gi-Oh! ONLINE 2 on PC, but that game no longer exists. 😥
I guess it wasn't really objectively better than any other Yu-Gi-Oh! game that's around today. In fact, you could consider it a really expensive micro-transaction-based game. I'm just really nostalgic for it, because I played it in my careless teenage years and had so much fun with it. It gave me a feeling that no other Yu-Gi-Oh! game has captured since then.