The best-selling Steam games of 2013.
Games released on Steam in 2013, ranked by how many copies they have sold there since. Valve publishes no sales figures; these are Coilr's estimates from each game's reviews.
90 games, most copies first
1·PAYDAY 2
28M copies · 2013
2·Project Zomboid
22M copies · 2013
3·Tomb Raider Game of the Year
12M copies · 2013
4·Arma 3
8.4M copies · 2013
5·Company of Heroes 2
6.6M copies · 2013
6·Don't Starve
5.4M copies · 2013
7·Age of Empires II (Retired)
5.3M copies · 2013
8·Outlast
4.9M copies · 2013
9·Saints Row IV: Re-Elected
4.6M copies · 2013
10·Resident Evil 6
4.5M copies · 2013
11·BioShock Infinite
4.5M copies · 2013
12·Europa Universalis IV
4M copies · 2013
13·Batman™: Arkham Origins
3.8M copies · 2013
14·Total War: ROME II - Emperor Edition
2.9M copies · 2013
15·ORION: Prelude
2.8M copies · 2013
16·Assassin’s Creed® IV Black Flag™
2.7M copies · 2013
17·Papers, Please
2.4M copies · 2013
18·LEGO® Marvel™ Super Heroes
1.9M copies · 2013
19·Risk of Rain (2013)
1.9M copies · 2013
20·Skullgirls 2nd Encore
1.8M copies · 2013
21·The Stanley Parable
1.7M copies · 2013
22·Tom Clancy’s Splinter Cell Blacklist
1.6M copies · 2013
23·Game Dev Tycoon
1.5M copies · 2013
24·Call of Juarez: Gunslinger
1.5M copies · 2013
Brothers - A Tale of Two Sons
Trine 2: Complete Story
Injustice: Gods Among Us Ultimate Edition
Sniper: Ghost Warrior 2
Contagion
Resident Evil Revelations
The Walking Dead: Season Two
Sonic & All-Stars Racing Transformed Collection
DmC: Devil May Cry
Deus Ex: Human Revolution - Director's Cut
Sanctum 2
Shadow Warrior
NARUTO SHIPPUDEN: Ultimate Ninja STORM 3 Full Burst HD
The Wolf Among Us
Gone Home
Far Cry 3 - Blood Dragon
The Incredible Adventures of Van Helsing
Brutal Legend
Interstellar Marines
Rogue Legacy
Dust: An Elysian Tail
Remember Me
Surgeon Simulator
Worms Armageddon
Stronghold Crusader HD (2012)
Monaco: What's Yours Is Mine
Baldur's Gate: Enhanced Edition
The Bureau: XCOM Declassified
Spelunky
FEZ
OMSI 2: Steam Edition
Shadowrun Returns
Euro Truck Simulator
Gunpoint
Rayman® Legends
Hammerwatch
Antichamber
Castlevania: Lords of Shadow – Ultimate Edition
Slender: The Arrival
Blockland
TrackMania² Stadium
Amnesia: A Machine for Pigs
X Rebirth
SteamWorld Dig
Farming Simulator 2013 Titanium Edition
Baldur's Gate II: Enhanced Edition
FINAL FANTASY VIII
Democracy 3
Viscera Cleanup Detail: Santa's Rampage
ENSLAVED™: Odyssey to the West™ Premium Edition
Stronghold HD (2012)
DuckTales: Remastered
PAC-MAN™ Championship Edition DX+
Enclave
Evoland
Space Rangers HD: A War Apart
Reus
Tales of Maj'Eyal
DLC Quest
Guacamelee! Gold Edition
Race The Sun
Contrast
Cook, Serve, Delicious!
The Swapper
Long Live The Queen
The Cat Lady
Copies sold on Steam only, estimated from each game's Steam reviews, weighted by when they were written, how big the game is and who plays it (co-op games and story games differ most). Checked against 170 games whose developers announced their sales, the median estimate was 30% off. Free-to-play games are not ranked: their “owners” are everyone who pressed Play once. Neither are adult games, software, or games Steam no longer sells on their own (Grand Theft Auto V Legacy is the biggest): without a price there is no telling a delisted paid game from a closed free one.