Includes Source SDK
86 games in this category
← Back to all categoriesIncludes Source SDK: Unlock Modding and Development on Steam
The Includes Source SDK feature lets developers and gamers access Valve’s powerful Source engine tools directly from Steam. With 89 games supporting this feature, players can dive into modding, create custom maps, or tweak gameplay mechanics, enhancing replayability and community creativity.
Total Games
86
Feature Type
Official Steam Feature
Total Players
43,525
Avg Price
$8.44
Price Range
$1.29 - $49.99
Release Year Distribution
Top Games
86 Games
A Nights Haunting: Source
App ID: 3418380
Aperture Tag: The Paint Gun Testing Initiative
App ID: 280740
Attack on Titan - Clean-up Eren & Levi costume
App ID: 486001
Attack on Titan - Costume Set - Christmas
App ID: 486009
Attack on Titan - Costume Set - Halloween
App ID: 486007
Attack on Titan - Costume Set - Japanese New Year
App ID: 486011
Attack on Titan - Costume Set - Summer Festival
App ID: 486002
Attack on Titan - Episode 1
App ID: 486004
Attack on Titan - Episode 2
App ID: 486005
Attack on Titan - Episode 3
App ID: 486006
Attack on Titan - Mikasa Costume - Summer Festival
App ID: 486000
Attack on Titan - Weapon - Christmas
App ID: 486010
Attack on Titan - Weapon - Halloween
App ID: 486008
Attack on Titan - Weapon - Japanese New Year
App ID: 486012
Attack on Titan - Weapon - Summer Festival
App ID: 486003
Captain Content Pack
App ID: 492330
Conqueror Content Pack
App ID: 477810
Cream War
App ID: 2009360
Deluxe Content - Cossacks 3: Days of Brilliance
App ID: 565040
Deluxe Content - Cossacks 3: The Golden Age
App ID: 694190
Emperor Content Pack
App ID: 492331
Entropy : Zero 2
App ID: 1583720
Estranged: Act I
App ID: 261820
Evacuation
App ID: 2224920
FIREFIGHT RELOADED
App ID: 397680
Fast Detect
App ID: 353220
FearPark
App ID: 3434220
Fertility Clinic
App ID: 3891630
Fortress Connected
App ID: 3561600
Fortress Forever
App ID: 253530
From Earth
App ID: 334370
Garry's Mod
App ID: 4000
HIGhSCORE
App ID: 2136550
Half-Life 2 RTX
App ID: 2477290
Halloween Content Pack
App ID: 546860
Holdfast: Nations At War - Blackpowder Firearms
App ID: 3320400
Istrolid - Curves and Shadows
App ID: 614180
JBMod
App ID: 2158860
Jabroni Brawl: Episode 3
App ID: 869480
Lambda Fortress
App ID: 3564500
Leak. Prologue
App ID: 2292760
Left 4 Dead 2
App ID: 550
Lest - Deluxe 24
App ID: 3754860
Lest - Deluxe 24: Supporter Lorepak
App ID: 3756200
Logistique Act. 1
App ID: 1154130
Momentum Mod
App ID: 669270
Murino Adventures
App ID: 4115900
Obsidian Conflict
App ID: 17750
Open Fortress
App ID: 3561320
PASS Fortress
App ID: 3554290
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Frequently Asked Questions
What is Includes Source SDK on Steam?
The Includes Source SDK feature indicates that a game bundles Valve’s Source engine development kit, allowing developers and advanced users to access modding tools, create custom content, and tweak game mechanics directly from Steam.
How many games support Includes Source SDK?
89 games on Steam support Includes Source SDK.
How do I find Includes Source SDK games?
Navigate to the Steam store, use the filter menu to select the 'Includes Source SDK' feature, or search for the SDK in the game’s store page to discover titles that provide modding and development tools.