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hl2

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Fragsurf / Fragsurf-2

Star 96

Fragsurf is a standalone game based on HL2 surf and bhop movement mechanics.

steam modding unity unity3d surf source-engine hl2 counter-strike-source bhop-timer surf-timer bhoppers strafing strafe bunnyhop bhop air-acceleration sourceengine
  • Updated Dec 28, 2021
  • C#

Unyxos / srcds_exporter

Star 48

Prometheus Exporter for SRCDS game servers, working with CSGO, CSS, GMod, HL2, L4D2 and TF2 !

css metrics exporter grafana counter-strike csgo gmod garrys-mod prometheus tf2 prometheus-exporter source-engine garrysmod hl2 left4dead2 l4d2 half-life-2 team-fortress-2
  • Updated Mar 28, 2024
  • JavaScript

UncraftedName / UntitledParser

Star 35

Used to parse source demos.

portal source-engine hl2 portal2 l4d2 demo-parser
  • Updated Feb 10, 2026
  • C#

stanriders / hl2-asw-port

Star 26

Porting Half-Life 2 base to the Alien Swarm Engine

mod source-engine hl2 alien-swarm
  • Updated Jun 1, 2015
  • C++

BinaryAlien / libssq

Star 20

☢️ A modern Source Server Query protocol library written in C99

c library cmake cpp protocol c99 valve tf2 source-engine hl2 l4d2 a2s ssq
  • Updated May 15, 2026
  • C

BerntA / BrainBread2

Star 19

BrainBread 2 Source Code

game gamedev steam modding cplusplus standalone valve source sourcemod source-engine zombies half-life hl2 source-sdk half-life-2 brainbread brainbread2 bb2 sdk2013
  • Updated Oct 4, 2025
  • C++

BerntA / tfo-code

Star 15

The Forgotten Ones Source Code

game steam modding cplusplus mod standalone valve source source-engine horror hl2 half-life-2 sdk2013
  • Updated Aug 9, 2023
  • C++

ntrf / blamod

Star 13

Blamod Reborn Acrhive. See the link instead.

mod speedrun hl2
  • Updated Oct 10, 2023
  • C++

followingthefasciaplane / crouching-airaccel-patch

Star 12

Fixes a bug that reduces air-acceleration while crouched in CS:S

css plugin sm timer counter-strike valve sourcemod tas surf source-engine fix movement hl2 sourcepawn strafing strafe bhop kz cs2 dhooks
  • Updated Oct 4, 2024
  • SourcePawn

Mikusch / tf-sprinting

Sponsor
Star 11

Team Fortress 2 server plugin that allows players to sprint like in Half-Life 2

tf2 sourcemod hl2 team-fortress-2 sprinting
  • Updated Jan 15, 2021
  • SourcePawn

followingthefasciaplane / sm-boardstats-coach

Star 10

a sourcemod plugin for css surf that feeds you engine-accurate data about how good or bad you are at boarding ramps.

css plugin csgo sourcemod tas surf movement hl2 alliedmodders l4d2 strafe bhop hl trikz cs2
  • Updated Dec 8, 2025
  • SourcePawn

DyaMetR / hl2hud

Star 9

An addon for Garry's Mod that mimicks the Heads Up Display feature from Valve's 2004 game Half-Life 2 adding a deep customization layer to it.

lua modding mod gmod garrys-mod hud garrysmod hl2 gmod-lua
  • Updated Jun 16, 2025
  • Lua

AusHick / SlimBSP

Star 9

A slimmed down and improved version of the Source SDK 2013 map compile tools

mapping gmod garrysmod bsp hl2 sourcesdk vrad vbsp vvis
  • Updated Apr 4, 2017
  • C++

BerntA / SourceEngineMaps

Star 8

A collection of maps for Source Engine based mods.

gamedev steam engine source quake goldsrc half-life bsp misc hl2 vmf level-design half-life-2 brainbread brainbread2 bb2 tfo hl infestus the-forgotten-ones
  • Updated Jul 22, 2026

LakoMoor / SE2013

Star 8

Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses

css cross-platform game-engine waf valve source-engine cs hl2 hl2dm hl2mp valve-games half-life2
  • Updated Sep 26, 2023
  • C++

robotboy655 / gmod-hl2-tools

Star 8

Half-Life 2 related tools for Garry's Mod Sandbox gamemode

sandbox gmod half-life hl2
  • Updated Jan 9, 2026
  • Lua

Outerbeast / SC-Half-Life-2-Weapons

Star 7

Half-Life 2 weapons for Sven Co-op

goldsrc weapons hl2 angelscript half-life-2 svencoop sc2 svengine custom-weapons angelscript-language sven-co-op gravity-gun custom-entity
  • Updated May 17, 2026
  • AngelScript

followingthefasciaplane / source-engine-diff-check

Star 6

This repository acts as a diff checker for gamemovement.cpp from the Source SDK 2004 to the HL2/CSGO 2018 leak, additionally tracks more comprehensive updates made in the CSGO engine branch.

sdk sm timer valve tf2 sourcemod updates surf source-engine branch momentum movement metamod hl2 l4d2 surfing bhop kz diff-checker gamemovement
  • Updated Oct 7, 2024
  • C++

BerntA / BlueShiftCoop

Star 6

Half-Life: Blue Shift Co-op

mod sourcemod source-engine half-life hl2 sourcepawn co-op black-mesa blue-shift source-coop
  • Updated Aug 8, 2023
  • SourcePawn

BerntA / GameServerBrowser

Star 5

A simple Blazor powered game server browser

steam mod hlds srcds valve source sourcemod steam-api goldsrc half-life hl2 source-sdk server-browser blazor blazor-application valve-games blazor-server
  • Updated Aug 23, 2026
  • C#

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