Everything on Steam, newest first: games, DLC, demos, playtests, software, tools, soundtracks and videos. New ones appear within seconds of Steam adding them.
On Steam, an app is one product: a game, a DLC, a demo, a soundtrack, a piece of software. Each has its own number (the App ID, the number in its store link), usually its own store page and community hub, and it is what shows up in your library.
You don't buy apps directly: you buy or activate a package, which unlocks one or more apps.
| App | Type | Released | Playing now | Owners (est.) |
|---|---|---|---|---|
 Star Trek Online - Phaser Turret Unlock KeyApp 9907 | DLC | — | — | — |
 Star Trek Online - Standard CD KeyApp 9906 | DLC | — | — | — |
 Star Trek Online - Deluxe CD KeyApp 9905 | DLC | — | — | — |
 Rage Sewers DLCApp 9241 | DLC | — | — | — |
 Rage Authority Pack DLCApp 9240 | DLC | — | — | — |
 Borderlands: The Zombie Island of Dr. Ned |
We read every app on Steam continuously, so this list fills in and stays current on its own. Owners are SteamSpy's estimate for games and software; † marks an estimate from the app's Steam review count (about 20 to 60 owners per review), used for DLC, soundtracks and the rest.
| DLC |
| Dec 9, 2009 |
| — |
| 9K–27.1K† |
 Borderlands DLCApp 8960 | DLC | — | — | — |
 Borderlands DLC: Claptrap's New Robot RevolutionApp 8955 | DLC | — | — | 0–20K |
 STCC - The Game 1 - Expansion Pack for RACE 07App 8690 | DLC | Oct 22, 2008 | 0 | 300–900† |
 GTR Evolution Expansion Pack for RACE 07App 8660 | DLC | Sep 1, 2008 | 0 | 1.2K–3.6K† |
 RACE 07: Andy Priaulx Crowne Plaza Raceway (Free DLC)App 8650 | DLC | Jun 25, 2008 | 5 | 280–840† |
 Shank SoundtrackApp 6122 | DLC | — | — | — |
 Natural Selection 2 - Deluxe Edition UpgradeApp 4932 | DLC | — | — | — |
 Natural Selection 2 - PAX DLCApp 4931 | DLC | — | — | — |
 Natural Selection 2 - Black ArmorApp 4930 | DLC | — | — | — |
 Cossacks: Campaign ExpansionApp 4856 | DLC | Jan 21, 2011 | — | 520–1.6K† |
 Medieval II: Total War™ KingdomsApp 4780 | DLC | Aug 28, 2007 | — | 11K–33.1K† |
 ValveTestApp3750App 3750 | DLC | — | — | — |
 X3: A Sunny PlaceApp 2827 | DLC | — | — | — |
 X3: Terran ConflictApp 2826 | DLC | — | — | — |
 Neverwinter Nights 2 Expansion 2App 2768 | DLC | — | — | — |
 Neverwinter Nights 2 Expansion 1App 2767 | DLC | — | — | — |
 ThreadSpace: Hyperbol SoundtrackApp 2726 | DLC | — | — | — |
 DEFCON Soundtrack DLCApp 1535 | DLC | — | — | — |
 ValveTestApp1528-do-not-useApp 1528 | DLC | — | — | — |
 Darwinia Soundtrack DLCApp 1515 | DLC | — | — | — |
 ValveTestApp1507-do-not-useApp 1507 | DLC | — | — | — |
 Killing Floor: Nightfall Character PackApp 1257 | DLC | May 19, 2010 | — | 1.5K–4.6K† |
 Killing Floor Outbreak Character PackApp 1256 | DLC | Jul 24, 2009 | — | 1.3K–3.8K† |
 Killing Floor DLC 1App 1255 | DLC | — | — | — |
 Portal 2 - Sixense Motion PreorderApp 669 | DLC | — | — | — |
 Portal 2 Sixense MotionPack DLCApp 660 | DLC | — | — | 80–240† |
 Portal 2 - Summer 2011 DLCApp 654 | DLC | — | — | — |
 Portal 2 - Bot Antenna Topper DLCApp 653 | DLC | — | — | — |
 Portal 2 - Bot Roll Cage DLCApp 652 | DLC | — | — | — |
 Portal 2 - Bot Paint Job DLCApp 651 | DLC | — | — | — |
 Portal 2 - Gamestop PS3 DLCApp 650 | DLC | — | — | — |
 Dota 2 - International AxeApp 586 | DLC | — | — | — |
 Dota 2 - Plush Donkey CourierApp 585 | DLC | — | — | — |
 Dota 2 - Inflatable Donkey CourierApp 584 | DLC | — | — | — |
 Dota 2 - Drodo the DruffinApp 583 | DLC | — | — | — |
 Dota 2 - Lockjaw the BoxhoundApp 582 | DLC | — | — | — |
 Dota 2 - Murrissey the SmeevilApp 581 | DLC | — | — | — |
 Dota 2 - SteelSeries DLC App 576 | DLC | — | — | — |
 Left 4 Dead 2 Preorder DLCApp 565 | DLC | — | — | — |
 Team Fortress 2 - Premium DLCApp 459 | DLC | — | — | — |
 Team Fortress 2 - Summer 2011 DLCApp 458 | DLC | — | — | — |
 Team Fortress 2 - Summer 2012 Sale Bundle DLCApp 457 | DLC | — | — | — |
 Team Fortress 2 - Summer 2012 Community Bundle DLCApp 456 | DLC | — | — | — |
