# ValveSoftware/source-sdk-2013

> Source SDK 2013 is Valve's official source code release for building mods on the Source engine, containing the game code for Half-Life 2, HL2: DM and Team Fortress 2.

- Magnitude: 1.4 out of 10 — Steady
- Stars: 10,110 total · +2 stars measured 2026-11-01, 11:01–14:35 UTC, ≈ 4 by evening
- Star trust: star growth looks organic
- Category: Games & graphics · Language: C++ · Created: 2013-06-26 · Last push: 2026-10-10
- GitHub: https://github.com/ValveSoftware/source-sdk-2013 · Homepage: https://developer.valvesoftware.com/wiki/SDK2013_GettingStarted · Page: https://gitnova.dev/en/r/ValveSoftware/source-sdk-2013

## Useful for

- Build a custom Source engine mod by compiling the SDK with Visual Studio or podman
- Modify Team Fortress 2 or Half-Life 2 gameplay code and test it locally
- Package and distribute a finished mod on Steam using the Steam Runtime build

## Why it’s here

- Star-counter measurements on 2026-11-01 (UTC), 11:01–14:35: 10108 → 10110 stars (+2). This is the change over that interval.
- Estimated end-of-day forecast: about +4 stars, using observed gains and the previous day.
- GitHub Trending C++ today: #6, +7 stars.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 3,096
- Issues and pull requests: 2,106
- Watchers: 316
- Average over the last week: 4 per day
- Usual pace: 3 per day
- Stars in the last hour (measured): 1

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-10-03 … 2026-11-01: 3, 4, 3, 4, 1, 3, 3, 3, 2, 6, 4, 3, 1, 3, 1, 3, 2, 4, 3, 2, 2, 3, 3, 2, 5, 3, 3, 5, 9, 2

## Spotted in now

- GitHub Trending C++ today: #6, +7 stars

## Similar by description

1. **cranebeaker/coop-anything** — 2.6 · Steady · AI agents · Python · +36 stars measured 2026-11-01, 00:05–14:32 UTC, ≈ 60 by evening
   An MCP server and playbook for AI agents to add co-op to single-player games: reverse engineering, building, testing, and packaging mods.
   Full card: https://gitnova.dev/en/r/cranebeaker/coop-anything.md

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-11-01 14:39 UTC, updated every 30 minutes.