Classic Games. Reminisce. Discuss. Discover lost treasures.
I'll kick things off.
Flashback. Out of This World and Fade to motherfuckin' Black. Those games still have some of the best animation I've ever seen. Must-play. (Not sure what the best version to get is. Maybe Wikipedia knows.)
Flashback
Out of This World (apparently aka Another World in some territories)
Fade to Black
Another World was recently re-released for the PC with better graphics. Google "Another World 15th Anniversary Edition" for details.
But whatever you do, don't add the word "torrent" to the search, because that would be bad. 
Sweet! This idea is paying dividends already.
Discussion topic: Who here has ever installed a game from 5.25" floppy disks? Did you have to unzip it first? [/oldschool]
I used to have quite a few 5.25" disk games, on my first ever computer.
I ran them using the command "LOAD"*",8,1".
Bonus geek points if anyone knows what system I had. 
Out of this World was nice, but I really hate the idea that to win the game you have to practically memorize a series of button presses and timings and execute them in perfect order, or you'll trip over a slug or something and die.
Bonus geek points if anyone knows what system I had.
COMMODORE 64, the rhyming computer. Which games? Any Choplifter love?
After I had first finished Portal, I told my friend that it reminded me of Lode Runner. He looked at me with kind of a blank expression, and it made me sad. Read Wikipedia's description and it'll be obvious where this nostalgia comes from. The games are very similar... one might almost say... analogous.
Apparently you can get Lode Runner on the Wii from the Virtual Console... if you can get a Wii.
The most important hasn't been mentioned yet.
Commander Keen!
It's a great game, although I only finished part 1, 3 and 4 
That's not oldschool.
Oldschool is 3" disks (not 3?") with room for 178Kb on each side and each disk cost me 80 DKK (roughly 15 USD, 11 EUR, 8 GBP).
Now somebody guess what my first computer was.
(Though even more oldschool would be cassette tapes of course, where you had to manually adjust the azimuth on the tape head, or further back to punch cards...)