Weekend PC download deals: XCOM for $18

When the New World Order seizes power in 2013, all your old money will be useless, replaced with Citidollars. Pre-empt the blighters by blowing everything on downloadable PC games this weekends, with deals including XCOM: Enemy Unknown for $18, Just Cause 2 for $4, Hotline Miami for $5, both BioShocks for $5, Batman: Arkham City GotY for $9, Arma 2: Combined Ops for $13, Dark Souls for $18, and Borderlands 2 for $30.

Here's our selection of this weekend's PC deals:

GameFly

GameFly's end of the year sale includes:

• Alan Wake (Steam) - $7.49 (75% off)

• Alan Wake's American Nightmare (Steam) - $3.75 (75% off)

• Endless Space Special Edition (Steam) - $17.49 (50% off)

• Painkiller Hell & Damnation (Steam) - $14.99 (25% off)

Painkiller Hell & Damnation

Amazon

Amazon's festive sale includes:

• Anno 2070 - $19.99 (60% off)

• Arma 2: Combined Operations - $17.99 (40% off)

• Assassin's Creed Brotherhood - $4.99 (75% off)

• Assassin's Creed Revelations - $10.19 (66% off)

• BioShock + BioShock 2 - $4.99 (88% off)

• BioShock + BioShock 2 + Spec Ops: The Line (Steam) - $9.99 (89% off)

• BioShock + BioShock 2 + Civilization IV Complete + Civilization V GotY + Civilization V: Gods & Kings + CivCity: Rome + Duke Nukem Forever Complete + Mafia II + The Stronghold Collection - $29.99 (88% off)

• Borderlands GotY + Duke Nukem Forever + The Darkness II (Steam) - $9.99 (80% off)

• Civilization IV Complete + Civilization V GotY + Civilization V: Gods & Kings & The Stronghold Collection (Steam) - $19.99 (85% off)

• Costume Quest + Psychonauts + Stacking (Steam) - $7.49 (81% off)

• Dark Souls (Steam) - $17.99 (55% off)

• Hotline Miami (Steam) - $4.99 (50% off)

• Just Cause 2 (Steam) - $3.74 (75% off)

• L.A. Noire Complete (Steam) - $7.49 (75% off)

• LEGO The Lord of the Rings (Steam) - $20.09 (33% off)

• Mass Effect Trilogy (Origin) - $29.99 (50% off)

• Payday: The Heist (Steam) - $4.99 (75% off)

• Payday: The Heist four-pack (Steam) - $14.99 (81% off)

• Scribblenauts Unlimited (Steam) - $20.09 (33% off)

• The Sims 3 (Origin) - $10.19 (66% off)

• The Walking Dead (Steam) - $12.49 (50% off)

• Torchlight - $4.99 (75% off)

• Wargame: European Escalation - $15.99 (60% off)

Dark Souls

Blizzard

• World of Warcraft + WoW: The Burning Crusade + WoW: Wrath of the Lich King - $5.00 (75% off)

• World of Warcraft: Cataclysm - $10.00 (75% off)

• World of Warcraft: Mists of Pandaria - $30.00 (25% off)

World of Warcraft: Mists of Pandaria

GamersGate

GamersGate's huge festive sale includes:

• Anno 2070: Deep Ocean - $14.98 (50% off)

• Doom 3 BFG Edition (Steam) - $14.98 (50% off)

• Dragon Age: Origins - Ultimate Edition + Dragon Age 2 - $14.99 (70% off)

• Jagged Alliance: Back in Action (Steam) - $13.58 (66% off)

• Orcs Must Die! (Steam) - $2.50 (75% off)

• Orcs Must Die! 2 (Steam) - $5.08 (66% off)

• Solar Empire: Trinity (Steam) - $9.98 (50% off)

• Super Meat Boy (Steam) - $3.74 (75% off)

• Torchlight II (Steam) - $9.97 (50% off)

Orcs Must Die! 2

Get Games

• Borderlands 2 (Steam) - $29.99 (50% off)

• Borderlands 2 - Mechromancer DLC (Steam) - $4.99 (50% off)

• Borderlands 2 - Collector's Edition DLC (Steam) - $3.99 (20% off)

• Borderlands 2 - Creature Slaughterdome DLC (Steam) - $3.99 (20% off)

• Borderlands 2 - DLC Season Pass (Steam) - $14.99 (50% off)

• Borderlands 2 - Captain Scarlett DLC (Steam) - $4.99 (50% off)

• Borderlands 2 - Mr. Torque DLC (Steam) - $4.99 (50% off)

• Carrier Command: Gaea Mission - $24.99 (50% off)

• Hell Yeah! Wrath of the Dead Rabbit (Steam) - $5.09 (66% off)

• Far Cry 3 - $38.49 (23% off)

• Far Cry 2 Deluxe Edition - $46.19 (23% off)

• King's Bounty Platinum Edition - $5.49 (82% off)

• Red Orchestra 2 GotY (Steam) - $5.49 (73% off)

• Serious Sam: The First Encounter HD (Steam) - $3.75 (75% off)

• Serious Sam: The Second Encounter HD (Steam) - $4.50 (75% off)

• Serious Sam Double D (Steam) - $2.00 (75% off)

Borderlands 2 - Captain Scarlett DLC

GOG

GOG's huge holiday sale has discounts on a bajillion games, and bigger savings in daily deals.

Friday:

• A squillion Might and Magic games - $25.89 (75% off)

Heroes of Might and Magic V

Green Man Gaming

Get 30% off almost every game with the voucher code GMG30-DPLIM-DN831. This makes many video games cheap, including these, some of which come from the end-of-year sale:

Friday:

• Worms Crazy Golf (Steam) - $2.38 (76% off)

• Worms Ultimate Mayhem (Steam) - $3.57 (76% off)

• XCOM: Enemy Unknown (Steam) - $17.50 (65% off)

Weekend:

• Arma 2: Combined Operations - $12.60 (58% off)

• Bastion - $4.20 (72% off)

• Batman: Arkham City GotY (Steam) - $8.40 (72% off)

• Darksiders (Steam) - $4.20 (79% off)

• Metro 2033 (Steam) - $4.20 (79% off)

• Rome: Total War + Rome: Total War Alexander - $3.09 (76% off)

• Rome: Total War + Medieval II: Total War + Empire: Total War + Napoleon: Total War + Total War: Shogun 2 + Viking: Battle for Asgard + Total War Battles: Shogun - $15.75 (85% off)

• Saints Row: The Third - The Full Package (Steam) - $8.75 (85% off)

• Total War: Shogun 2 + DLC (Steam) - $11.90 (76% off)

• Total War: Shogun 2 - Fall of the Samurai + DLC (Steam) - $9.52 (76% off)

Saints Row: The Third

Humble Bundle

Pay what you want for The Binding of Isaac plus its expansion, Closure, Shank 2, and Snapshot. You also get Indie Game: The Movie and some soundtracks. Beat the average to get Legend of Grimrock, Dungeon Defenders, The Basement Collection, Offspring Fling and Cave Story+ too.

The Binding of Isaac

Impulse

Impulse's holiday sale includes:

• Sanctum (Steam) - $2.49 (75% off)

• The Amazing Spider-Man - $24.99 (50% off)

• Tony Hawk's Pro Skater HD (Steam) - $4.99 (50% off)

• Transformers: Fall of Cybertron (Steam) - $29.99 (50% off)

Tony Hawk's Pro Skater HD

Origin

EA's holiday sale includes:

• Battlefield 3 - $19.99 (50% off)

• Command & Conquer Ultimate Collection - $24.99 (50% off)

• Mass Effect 3 - $14.99 (50% off)

• Mass Effect 3 Digital Deluxe - $19.99 (50% off)

Mass Effect 3

Steam

Steam's colossal holiday sale includes daily deals, flash sales, discounts you can vote on, and a million games. Here, the daily deal highlights:

Ends Saturday:

• Counter-Strike + CS: Condition Zero + Day of Defeat + Deathmatch Classic + Ricochet - $3.74 (75% off)

• Counter-Strike: Source - $4.99 (75% off)

• Counter-Strike: Global Offensive - $7.49 (50% off)

• Counter-Strike + CS: Condition Zero + CS: Source + CS: Global Offensive - $9.99 (67% off)

• FTL: Faster Than Light - $4.99 (50% off)

• FTL: Faster Than Light + soundtrack - $6.98 (50% off)

• L.A. Noire - $4.99 (75% off)

• L.A. Noire Complete - $7.49 (75% off)

• L.A. Noire DLC bundle - $2.99 (75% off)

• LEGO The Lord of the Rings - $20.09 (33% off)

• Worms - $1.99 (75% off)

• Worms Crazy Golf - $2.49 (75% off)

• Worms Reloaded GotY - $6.24 (75% off)

• Worms Revolution - $7.49 (50% off)

• Worms Revolution four-pack - $22.49 (50% off)

• Worms Revolution - DLC season pass - $7.49 (50% off)

• Worms Ultimate Mayhem - $3.74 (75% off)

• Worms Complete Pack - $19.99 (75% off)

Ends Sunday:

• Assassin's Creed - $4.99 (75% off)

• Assassin's Creed 2 Deluxe - $4.99 (75% off)

• Assassin's Creed Brotherhood - $4.99 (75% off)

• Assassin's Creed Brotherhood Deluxe - $7.49 (75% off)

• Assassin's Creed Revelations - $10.19 (66% off)

• Assassin's Creed 3 - $37.49 (25% off)

• Assassin's Creed 3 - DLC Season Pass - $22.49 (25% off)

• Assassin's Creed Franchise Pack - $64.99 (34% off)

• Just Cause 2 - $3.74 (75% off)

• Left 4 Dead - $4.99 (75% off)

• Left 4 Dead 2 - $4.99 (75% off)

• Left 4 Dead + Left 4 Dead 2 - $7.49 (75% off)

• Limbo - $2.49 (75% off)

• Prototype - $4.99 (75% off)

• Prototype 2 - $19.99 (50% off)

• Prototype 2 RADNET DLC - $4.99 (50% off)

• Sins of a Solar Empire: Rebellion - $13.59 (66% off)

• Sins of a Solar Empire: Rebellion four-pack - $40.79 (66% off)

FTL