X-Com: UFO Defense

It's simply a classic turn based game, one so good they remade it years later with modern graphics, XCOM 2

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Oh, the hundreds of hours spent on this one... And if you find it too hard/slow to obtain some precious weapons/ammo, I guess that the good old bug is still around: The game actually runs separately the world/GUI and the actual battle. And the battle process communicates with the main process by means of updating a file on the disk when the battle is over. So, if you have a battle in which you looted a lot of ammo and/or alien weapons, you can replicate the results by launching any other battle and terminating the battle process with Ctrl-C. It will not overwrite the previous battle results, so the main process will gladly use them again :)

Sound doesn't work. The setup program seems to crash out. If it's working it's still not setting the sound. Since listening to the alien's movement during their turn is a big part of the game, the missing sound is an big issue.

A great classic. If You are a fan of squad-based tactical games, You just need to play this. However, i do NOT recommend to buy it here (sorry, GOG). Instead - go for Open Xcom. It's better incarnation of this great game, and it is free... and more - there are a lot of mods for it (and you can also easily create Your own mod if you want). BTW- i highly reccomend to play without saving during tactical missions :) This changes a lot.