2 and a freebie. I'll buy more as soon as I finish one of these two games.
Celtic Kings
Spellforce
Sacrifice and Sacred are probably the next ones I'll buy.
Broken Sword II is on my list also, played it back in high school I think, loved it. And I think I'll get one of those space games also. Can't decide yet. Haegemonia or Freespace.

4 so far:
Fallout 1
Fallout 2
Gothic
Flatout
planning to buy: Gothic 2 gold

Bought Fallout 1 & got Fallout 2 (have the originals, but I wanted the DRM-freeness and no-hassle installability in XP, Vista and Windows 7) free
Stonekeep
Die by the Sword
TOCA Race Driver 3
FlatOut
1nsane
I really like GOG!

Just the 2 so far:
Duke Nukem 3D
Rise of the Triad

Just bought another eight.
In Cold Blood
Beyond Good and Evil
Commanche vs Hokum
Screamer
Original War
Painkiller
Pro Pinball USA
Capitalism Plus
That's only 43 or so in your Earth dollars. What a steal.

Added;
Gothic
Gothic 2 Gold
Painkiller Black
Far Cry

Duke Nukem 3D
Redneck Rampage
Painkiller Black Edition
Thanks 4 this great service GOG.com
I hope that one beutiful day, GOG.com will offer Metal Gear Solid 1 and 2 :)
That would be a dream come true.

Just the two Fallout's

There are nine little "boxes" on my "shelf."
I have one of the freebies, I picked up Beyond Good & Evil just a couple of days ago, I've got the Disciples games, I've got Heroes of Might and Magic. (Played it on a friend's machine back in the day, but the first one I'd actually bought was Heroes 2.) I have the Fallouts in case my discs fail, and Freespace 2 because while I still have my discs for that one, too, I was too lazy to go dig them up. :)

Two games so far, excluding the three free ones:
Flatout
Neighbours From Hell Compilation

Here is a screen of my updated list.

*big breath*
Gorky 17
Jack Orlando
Septerra Core
Shogo
Duke Nukem 3D
Tex Murphy 1+2
Kingpin
Giants: Citizen Kabuto
Freespace 2
Teenagent
Beneath A Steel Sky
Lure Of The Temptress
Redneck Rampage Collection

Current collection..

Fallout
Fallout 2
Fallout Tactics
Gothic
Gothic 2 Gold
Earth 2140 Trilogy
Earth 2150 Trilogy
Earyh 2160
Broken Sword: The Smoking Mirror
Broken Sword: The Sleeeping Dragon
TM: Mean Streets + Martian Memorandum
TM: Under a Killing Moon
TM: Pandora Directive
TM: Overseer
Spellforce Platinum
BASS (Free)
LOTT (Free)
Teen Agent (Free)
Waxworks
The Feeble Files
The Nations
Alien Nations
Perimeter
Simon the Sorcerer
Simon the Sorcerer II
Celtic Kings
Ishar Compilation
Lords of Magic SE
The Guild Gold
Sacred Gold
In Cold Blood
Obscure
Hostile Waters: Anthaeus Rising
Haegemonia Gold
Painkiller Black Edition
Rainbow Six
Ghost Recon
Pro Pinball Fantastic Journey
Pro Pinball Timeshock
Pro Pinball BRUSA
Pure Pinball 2.0
Flatout
CMR 2005
TOCA RD3

My Shelf, a healthy sized collection that I'm proud of.
I would like another shelf line to help me organize better.