Half-Life Decay: Solo Mission is a new, upcoming fan-remake of the PS2 exclusive Half-Life expansion "Decay", with the goal of rebuilding the game from the ground up to function as a seamless, single-player experience.

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Community-Made Mod

This free, community made Mod requires that you own Half-Life.

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Download Half-Life Decay: Solo Mission Demo

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About This Game

Half-Life: Decay, the final, and most often forgotten expansion in the acclaimed Half-Life Anthology, as never seen before! Half-Life Decay: Solo Mission is a fan project that aims to rebuild every chapter from Decay from the ground up, give it a fresh coat of polish, and then retool it all to make for a seamless single-player experience, all without sacrificing any of the quality, gameplay, or presentation of the original expansion.

Planned Features:

  • Remade Decay campaign, retooled for single player
  • A newly implemented subtitle system, complete with English, French, Italian, German, Spanish, Chinese, Korean, and Russian localization
  • Full support for both the original, and HD pack models
  • Commentary mode, showcasing the development of Solo Mission
  • And perhaps even more...

Mature Content Description

The developers describe the content like this:

This mod contains physical violence, gore, death, and use of deadly weapons.

System Requirements

    Minimum:
    • OS *: Windows Vista, 7, 8, and 10
    • Processor: 500 Mhz
    • Memory: 96 MB RAM
    • Graphics: 16Mb Video Card
    • Additional Notes: Requires Half-Life to play
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
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