If you mean the new ones... they're XCOM while the old ones are X-COM; with a dash.
I personally don't like the older ones... just too old for my liking.
I like XCOM while the yahtzee (Zero Punctuation) review says XCOM 2 is more of the same... but to me that's not a bad thing.
However if you mean the old ones I have: X-COM: Enforcer & X-COM: Interceptor.

---Edit---
Oh I should clarify... the copies I have are Steam but I believe they're old enough that there's no DRM on them (Steam just downloads).

My main Trading Post
My Steam Games with Cards Trading Post

Rarities and Curiosities

Thank you for your consideration

--
Reminder:
I accept Steam Trading Cards for all my keys. Details are in the respective Trading Posts above. Swap your unwanted Steam Cards for games now! :)

Please Note:
Too many scammers trying to fleece me in Chat lately. As such I'm defensively paranoid. Will not deal with someone I do not recognise.

Fuin, thanks for the great trade!

Thanks yourself. :)

Obligatory bump:
[Want]
...
Other stuff from my wishlist.

[Have]
My list.

If I have something of interest, send me an offer.

BUMP!

From the 2K promo, I want:

Sid Meier's Pirates!
X-COM: UFO Defense
X-COM: Terror from the Deep
X-COM: Apocalypse
Railroad Tycoon 2 Platinum
Railroad Tycoon 3
Sid Meier's Railroads!

Or check my wishlist.

Here's what I have on GOG:

Aarklash: Legacy
Arcanum: Of Steamworks and Magick Obscura
Baldur's Gate II: Enhanced Edition
Consortium, The: Master Edition
Dig, The
DOOM II + Final DOOM
Duke Nukem 3D Atomic Edition
Hotline Miami
Icewind Dale: Enhanced Edition
Indiana Jones and the Fate of Atlantis
Legend of Kyrandia Pack (Book I-II-III)
Leisure Suit Larry (Greatest Hits and Misses)
Lichdom: Battlemage
Monkey Island Classics bundle (1 + 2 SE)
Never Alone: Arctic Collection
Psychonauts
Quake: The Offering
Quest for Infamy
Sacred Gold
Sam & Max Hit the Road
Sam & Max Save the World
Tales of Monkey Island
Total Annihilation: Commander Pack
Total Annihilation: Kingdoms + Iron Plague
Ultimate DOOM, The

For my Steam have list, please see here.

And here's my list of people I'v succefully traded with.

HAVE
GOG code for Witcher3: Wild Hunt


WANT
GOG code for SOMA


( :

Thank you for a nice and friendly trade, Polly77!

And thank you Skimmie for making my first trade a good experience. :)

have
contreption maker (steam)
want
freedom force pack (gog)
trine 2

HAVE (Steam keys):

Inquisitor Deluxe Edition
Hard Reset Extended Edition
The First Templar - Steam Special Edition
Super 3-D Noah's Ark
Painkiller: Black Edition
100% Orange Juice
Divekick
Universe Sandbox
Silence of the Sleep
Town of Salem
SolForge — Dinosaur Starter
Flying Tigers: Shadows Over China
Oceanhorn: Monster of the Uncharted Seas
Shadowrun Chronicles - Boston Lockdown
WARMACHINE Tactics
WARMACHINE Tactics - Mercenaries Faction Bundle
Holy Potatoes! A Weapon Shop?!
TransOcean: The Shipping Company

WANT:

Anything from my Steam and/or GOG wishlists:
http://steamcommunity.com/profiles/76561197996133473/wishlist

perfect trade with grargar, big thanks

Have:
South Park: Stick of Truth (Steam Humble Bundle Gift Link)

Want:
STALKER games (currently on sale on BundleStars)
The Evil Within
Will consider offers on here or Steam (Already own most games that have been Humble Bundled)

Edit: Also see my GOG Wishlist!

It's not public, no one can view your GOG wishlist.

Looking for:
Batman Arkham Asylum
Civilization IV Complete
Transport Giant

HAVE
GOG code for Witcher3: Wild Hunt

WANT
GOG code for SOMA

( :



Still available! I thought a popular game like Witcher 3 would get snapped up immediately.