The best-selling Steam games of 2011.
Games released on Steam in 2011, 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.
49 games, most copies first
1·Terraria
44M copies · 2011
2·Portal 2
11M copies · 2011
3·The Elder Scrolls V: Skyrim
9.1M copies · 2011
4·Saints Row: The Third
3.7M copies · 2011
5·PAYDAY™ The Heist
2.6M copies · 2011
6·Red Orchestra 2: Heroes of Stalingrad with Rising Storm
2.4M copies · 2011
7·Total War: SHOGUN 2
2.3M copies · 2011
8·Magicka
2.1M copies · 2011
9·The Binding of Isaac
2M copies · 2011
10·Mafia II (Classic)
2M copies · 2011
11·LIMBO
2M copies · 2011
12·Assassin’s Creed® Brotherhood
1.7M copies · 2011
13·Call of Duty®: Modern Warfare® 3 (2011)
1.5M copies · 2011
14·Call of Duty®: Modern Warfare® 3 (2011)
1.5M copies · 2011
15·Assassin's Creed® Revelations
1.4M copies · 2011
16·Bastion
1.4M copies · 2011
17·RAGE
1.4M copies · 2011
18·Dungeon Defenders
1.3M copies · 2011
19·Warhammer 40,000: Space Marine - Anniversary Edition
1.3M copies · 2011
20·The Sims™ 3
1.3M copies · 2011
21·Homefront
1.2M copies · 2011
22·Anno 2070™
1.2M copies · 2011
23·F.E.A.R. 3
1.2M copies · 2011
24·Serious Sam 3: BFE
1.1M copies · 2011
Dino D-Day
Alice: Madness Returns
Dead Space™ 2
Duke Nukem Forever
L.A. Noire
Might & Magic: Heroes VI
Mount & Blade: With Fire & Sword
Supreme Commander: Forged Alliance
Two Worlds II HD
Sonic Adventure DX
E.Y.E: Divine Cybermancy
LEGO® Star Wars™ III - The Clone Wars™
Max Payne
Crysis 2 - Maximum Edition
Tropico 4
Arma: Cold War Assault Remastered
Worms Ultimate Mayhem
Men of War: Assault Squad
Orcs Must Die!
Cave Story+
Fable - The Lost Chapters
The Tiny Bang Story
Dungeons of Dredmor
SpaceChem
Syberia
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.