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.) |
|---|---|---|---|---|
 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 Pack |
We read every app on Steam continuously, so this list fills in and stays current on its own. Owners are a public estimate service's range 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 |
| 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 | — | — | — |
