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.) |
|---|---|---|---|---|
 Portal 2 - Bot Roll Cage DLCApp 652 | DLC | — | — | — |
 Portal 2 - Bot Paint Job DLCApp 651 | DLC | — | — | — |
 Portal 2 - Gamestop PS3 DLCApp 650 | DLC | — | — | — |
 Portal 2 Publishing ToolApp 644 | Tool | — | 6 | — |
 Alien Swarm - SDKApp 640 | Tool | — | 0 | — |
 Alien Swarm Dedicated ServerApp 635 |
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.
| Tool |
| — |
| 5,219 |
| — |
 Alien SwarmApp 630 | Game | Jul 19, 2010 | 34 | 2M–5M |
 Portal 2 Authoring ToolsApp 629 | Tool | — | 40 | — |
 Portal 2App 620 | Game | Apr 19, 2011 | 2,294 | 5M–10M |
 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 Dedicated ServerApp 580 | Game | — | 0 | — |
 Dota 2 - SteelSeries DLC App 576 | DLC | — | — | — |
 Dota 2 - English DepotApp 575 | Config | — | — | — |
 Dota 2App 570 | Game | Jul 9, 2013 | 703,052 | 56.2M–168.7M† |
 Left 4 Dead 2 Preorder DLCApp 565 | DLC | — | — | — |
 Left 4 Dead 2 Add-on SupportApp 564 | Config | — | — | — |
 Left 4 Dead 2 Authoring ToolsApp 563 | Tool | — | 42 | — |
 Left 4 Dead 2App 550 | Game | Nov 17, 2009 | 28,008 | 50M–100M |
 Left 4 Dead Demo Dedicated ServerApp 540 | Tool | — | 0 | — |
 Left 4 Dead DemoApp 530 | Game | — | 0 | — |
 Left 4 Dead Authoring ToolsApp 513 | Tool | — | 2 | — |
 Left 4 Dead Dedicated ServerApp 510 | Tool | — | 0 | — |
 Left 4 DeadApp 500 | Game | Nov 18, 2008 | 626 | 5M–10M |
 ValveTestApp490App 490 | Game | — | 0 | — |
 SpacewarApp 480 | Game | — | 52,816 | — |
 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 | — | — | — |
 Team Fortress 2App 440 | Game | Oct 10, 2007 | 104,750 | 50M–100M |
 Half-Life 2: Episode TwoApp 420 | Game | Oct 10, 2007 | 74 | 5M–10M |
 Portal: First SliceApp 410 | Demo | May 8, 2008 | 17 | 4.4K–13.1K† |
 PortalApp 400 | Game | Oct 10, 2007 | 597 | 10M–20M |
 Half-Life 2: Episode OneApp 380 | Game | Jun 1, 2006 | 20 | 5M–10M |
 HL1:MP Linux clientApp 364 | Config | — | — | — |
 Half-Life Deathmatch: SourceApp 360 | Game | May 1, 2006 | 19 | 5M–10M |
 Half-Life 2: Lost CoastApp 340 | Game | Oct 27, 2005 | 1 | 20M–50M |
 Half-Life 2: DeathmatchApp 320 | Game | Nov 1, 2004 | 197 | 10M–20M |
 Source 2007 Dedicated ServerApp 310 | Tool | — | 0 | — |
 Day of Defeat: Source Press ReviewApp 304 | Game | — | 0 | — |
 Day of Defeat: SourceApp 300 | Game | Jul 12, 2010 | 448 | 2M–5M |
 Half-Life: SourceApp 280 | Game | Jun 1, 2004 | 26 | 2M–5M |
 Counter-Strike: SourceApp 240 | Game | Nov 1, 2004 | 3,879 | 10M–20M |
 Half-Life 2App 220 | Game | Nov 16, 2004 | 2,158 | 10M–20M |
 Half-Life 2: DemoApp 219 | Demo | Dec 1, 2004 | 23 | 3K–8.9K† |
