Valve releases Team Fortress 2 code

Original Article ↗ Hacker News Discussion ↗

Scope of the Release

  • Only the TF2 game layer is released, not the underlying Source engine.
  • You cannot port TF2 to new platforms without either re‑implementing Source or using leaked engine code (which would be legally risky).
  • Engine features like physics (Havok/VPhysics) and some rendering backends remain closed.

Why Source (and Source 2) Stay Closed

  • Major reason cited: third‑party middleware (Havok, Scaleform, audio/video codecs, console SDKs) under strict NDAs and non‑OSS licenses.
  • Untangling or rewriting these components would be a large, low‑ROI legal and engineering effort.
  • Some argue Valve also avoids support burden and public scrutiny of a messy, legacy codebase.

Comparisons to Other Engines

  • Debate over Source’s relevance: some call it outdated and technically poor compared to Unity/Unreal/Godot/O3DE; others note it “worked” and still ships popular games (Apex, older Valve titles).
  • Source 2 is seen as substantially more modern (PBR, volumetrics, better tools, Rubikon physics), but its ecosystem is tiny compared to Unreal’s.
  • Godot is praised for indie‑scale 2D/3D, but multiple commenters say it’s not yet a serious replacement for AAA‑class engines.

Modding, Forks, and Community Maintenance

  • Strong optimism that this will supercharge mods and derivative games (e.g., TF2 Classic, other TF‑like projects, potential Steam releases).
  • Many see it as Valve unofficially handing TF2’s evolution to the community while keeping servers/economy centralized.
  • Some hope for similar treatment for GoldSrc and HL1/2; legal and licensing tangles are cited as blockers.

Cheating and Security

  • Concern that access to TF2 code could aid cheat authors; counter‑argument is that Source and TF2 code have leaked multiple times, so serious cheat makers already had what they needed.
  • Anti‑cheat is viewed as more a design/service problem than a “source secrecy” one.

Valve’s Priorities, Platforms, and Business Model

  • Repeated reminder: Valve is ~400 people; limited staff constrain how many engines/ports they can support.
  • Mac support is seen as low‑priority: Apple’s historic hostility to games, 32‑bit deprecation, Metal‑only APIs, and tiny Steam share make ports hard to justify.
  • Discussion of Steam’s 30% cut, its much lower effective cut for mega‑publishers, and the contrast with engine royalties; many argue Valve makes far more from store + lootboxes/skins than from anything engine‑related.

Ethics and Legacy

  • Several threads criticize Valve’s skin‑based lootbox economy and its role in underage gambling and money laundering, especially in CS.
  • Others emphasize Valve’s positive legacy: idTech‑style source releases, strong Linux/Proton support, and the likelihood that TF2 will live on for decades through community efforts.