Half-Life Decay: Solo Mission mod

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NEW AND IMPROVED DEMO NOW AVAILABLE ON MODDB AND STEAM!

You can keep up with the project on Tumblr and Twitter, as well as support the project via Patreon

Half-Life Decay: Solo Mission is a new, upcoming port of the PS2 exclusive Half-Life expansion "Decay", with the goal of rebuilding the game to work as a single player experience, thus allowing anyone to play through the entirety of Decay without the need for setting up a private server, and all the headaches that come with it.

Along with allowing anyone to play Decay without needing a server, this port will also rework the visuals to make them more consistent with the original Half-Life, giving every map in Decay an extra bit of polish in the process, and all without making any major alterations to the original game.

CLICK HERE TO GET THE LIMITED EDITION POSTER!

FREQUENTLY ASKED QUESTIONS

Q: Will Dr. Colette Green make an appearance?

A: Colette Green won't be appearing in Decay: Solo Mission in any form whatsoever. As far as I'm concerned, Dr. Green exists solely as an avatar for the second player, and as a character has no real impact on the lore or any presence outside of Decay, unlike Dr. Cross who, alongside inventing the HEV suit, also makes cameos in every HL1 game and expansion.

Q: Will the source code/map sources be made public?

A: Yes! Nothing is available right now, as the contents of the mod are constantly changing. However, once the full mod is released, all of the source files will be made available for anyone to use as they wish!

Q: Will this mod explain what happened to the main characters of Decay after the ending?

A: It won't. The way I see it, any attempt by myself, or anyone else besides Valve and Gearbox, to add on to the story would be pure fan-fiction, and thus wouldn't have a place in Solo Mission.

Q: Will you be able to use the original Half-Life models?

A: Yes! One of the goals of Solo Mission is to make the aesthetics match the original release of Half-Life and it's expansions, including full compatibility with both the original models, and their original HD variants.

Q: Will Solo Mission include any of the cut content from Decay?

A: It won't. The main goal of Solo Mission is to simply make Decay into a single player experience, and to give it a bit of polish along the way. If I attempted to start adding new chapters to it, it'd stop being Decay and turn into something else entirely.

Q: Will the mod feature a co-op mode?

A: It won't. All of Decay is being re-worked in order to suit single-player gameplay. The amount of work to make the mod co-op would not only require re-reworking all of the levels, but would defeat the point of the entire project.

Q: Will the bonus mission, "Xen Attacks", be present in Solo Mission?

A: Yes! Just as it was in the original Half Life: Decay, Xen Attacks will be available as a bonus, unlockable mission, polished and re-created with the same level of care that's being given to the main game.

For those struggling with any particular puzzles, or who just want to have a look at the mod itself, have a look at the official Walkthrough!

Note: This port of Decay has no affiliation with the existing PC port, but it is utilizing some of it's publicly available source code. All maps and models being used in Half Life Decay: Solo Mission are based on assets pulled directly from the PS2 disc itself via Supadupaplex's PS2 Half-Life tools.

Artwork by Decepticoin, who's artwork can be found on Twitter and Deviantart.