As with X-Wing, you'll want to buy the GOG.com version for the Collector's CD edition. TIE Fighter is perhaps the best space sim ever made.

The Steam version is inferior to the GOG.com version, which has the 1994 Collector's CD, so grab that instead. X-Wing itself is an all-time classic.

One of the most beautiful games ever made married to a fun mix between racing and puzzle solving (and lackluster combat). Great music too. Punch a ♥♥♥♥.

Dark, foreboding, challenging, hard to master, and always full of surprises: Teleglitch is just like marriage. But you can beat Teleglitch.

One of the great classic RPGs. The retro-futuristic post-apocalypse it created and the compelling story it features make this a game worth playing.

Oh god please help me I can't stop playing this. It's hard as hell, twice as stylish, and insane amounts of fun. I can't get past level four.

One of the classics of the stealth genre, and still a lot of fun because of its amazing atmosphere, huge levels, wonderful sound design, and ghosts.

A roguelike that only takes a short time to play, and that contains tremendous depth and nuance. A game that never gets old. Plus it has smiley faces.

Dive through the air firing two pistols, land on the ground, roll over to the rifle a dead guy dropped, pick it up, and dive through a window.

Even better than it was the day it came out. Grab Open X-COM and play one of the best strategy games of all time.