This week, Microsoft is holding a sale on select 2K titles for Games for Windows. Here is a full list of the titles:

Sid Meier's Civilization IV: Complete - $39.99 / £29.99 $19.99 / £14.99
Sid Meier’s Civilization IV is the ultimate strategy game, offering players the chance to lead their chosen nation from the dawn of man through the space age and become the greatest ruler the world has ever known. Civilization IV: The Complete Edition includes the original strategy classic, plus all two expansion packs and the standalone game Colonization in one download, for an incredible value.
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Borderlands - $19.99 / £14.99 $9.99 / £7.49
With its addictive action, frantic first person shooter combat, massive arsenal of weaponry, RPG elements and four-player co-op, Borderlands is the breakthrough experience that challenges all the conventions of modern shooters. Borderlands places you in the role of a mercenary on the lawless and desolate planet of Pandora, hell-bent on finding a legendary stockpile of powerful alien technology known as The Vault.
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BioShock 2 (PC) - $19.99 / £14.99 $9.99 / £7.49
In BioShock 2, you step into the boots of the most iconic denizen of Rapture, the Big Daddy, as you explore through the decrepit and beautiful fallen city, chasing an unseen foe in search of answers and your own survival. The deep multiplayer mode is set during the fall of Rapture, where you assume the role of a combat test subject. The full depth of the BioShock experience is refined and transformed into a unique multiplayer experience that can only be found in Rapture.
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"Rapture Metro" for BioShock 2 - $9.99 / £6.35 $4.99 / £3.77
As one of our valued Sinclair Solutions testers, we specially invite you to enjoy the pleasure of Rebirth! But only if you are truly dedicated and fully ranked up. However all testers are eligible for the 6 new maps in Rapture Metro.
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"Sinclair Solutions Tester Pack" for Bioshock 2 - £4.99 / £3.25 $2.49 / £1.62
Opportunity Awaits! Expand your BioShock 2 multiplayer experience with a rank increase to 50 with Rank Rewards including a 3rd set of weapons upgrades. Plus, enjoy 20 new Trials, 2 new playable characters and 5 new Masks. Yes! We’d thought you’d like the sound of that!
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"Zigo and Blanche" for Bioshock 2 - £1.35 67p - still at full price of $1.99 in the US
Enroll in Sinclair Solution’s Consumer Rewards Program with two new characters for the BioShock 2 Multiplayer experience: Mlle Blanche de Glace, the internationally acclaimed actress, or Zigo D’Acosta, one of Rapture’s great sailors. Get out there and start earning those rewards!
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Edit: Just to clear up a bit of confusion, Bioshock 2 also has two free add-ons; one of which also includes achievements:

"Kill 'Em Kindly" - Free
What’s your golf handicap? Take this chance to turn your handicap into your enemy’s with this fresh melee mode where every blunt object is a golf club. No putting.
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"Protector Trials" - Free
You receive the call: Tenenbaum desperately needs you to steal as much ADAM as possible, to help thwart Sofia Lamb's insane plan. Enter the Protector Trials: frantic combat challenges designed to push your mastery of weapons and Plasmids to the limit. The goal in each Trial is simple: get your Little Sister to an ADAM-rich corpse and keep her safe while she gathers precious ADAM. Opposition mounts as your Little Sister nears her goal — will you survive the onslaught? Each Trial features three unique weapon and Plasmid load-outs, keeping the challenge fresh, as well as a fourth bonus load-out the player receives when all previous load-outs are completed.
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Only Bioshock 2 is a LIVE enabled game, therefore it is the only game with achievements; likewise, the only Bioshock 2 DLC that carries achievements is "Rapture Metro" and "Protector Trials".
Credit for this story goes to Xencsi
Rebecca Smith
Written by Rebecca Smith
Rebecca is the Newshound Manager at TrueGaming Network. She has been contributing articles since 2010, especially those that involve intimidatingly long lists. When not writing news, she works in an independent game shop so that she can spend all day talking about games too. She'll occasionally go outside.