1. Install `Source SDK Base 2013 Singleplayer` from Steam.
1. Switch SDK to upcoming beta. Press right click -> `Properties...` -> `Betas` and change the dropdown `None` to `upcoming - upcoming`. Changing this setting will prevent immediate crashes.
1. Download latest `hl2c.zip` file from [releases](https://github.com/Pinsplash/halflife2chaos/releases).
1. Extract `hl2chaos` from the dowloaded zip file into `Steam/steamapps/sourcemods/`.
Do the same for `ep1chaos` and `ep2chaos` if you want to play Chaos in Half-Life 2: Episode One/Two.
1. Restart Steam for the mod(s) to appear in your library.
1. Copy map (`.bsp`) files from `Steam/steamapps/common/Half-Life 2/___/maps/` into `Steam/steamapps/sourcemods/***/maps/`.
In place of `___` and `***` you will want to fill:
*`hl2` and `hl2chaos` for Half-Life 2
*`episodic` and `ep1chaos` for Half-Life 2: Episode One
*`ep2` and `ep2chaos` for Half-Life 2: Episode Two
Maps from mods (and Lost Coast) can also be used if you wish, though some things may not function correctly and additional original content (like textures and models) will need to be copied as well
5.`ln -s $(pwd)/sp/game/mod_hl2/bin ./sourcemods/hl2chaos/` Link bin directory from our build directory
6.`mkdir ~/.steam/steam/steamapps/sourcemods/hl2chaos; sudo mount --bind $(pwd)/sourcemods/hl2chaos ~/.steam/steam/steamapps/sourcemods/hl2chaos` Note the use of the bind mount instead of a symbolic link. Steam won't detect symbolic links. You can use `mv` or `cp` instead, if you don't care.
* To modify things about Chaos like effect duration and probability, edit `hl2chaos/cfg/autoexec.cfg`.
* Effect groups can be changed in `groups.cfg`.
* Want a specific effect? Use `chaos_test_effect` followed by a number. You can get any effect's number through `chaos_print`.
* Any CFG files you change must have their change reflected in the same file in all three mods if you wish for the change to apply in all of them. You can simply copy the file into the other two mod folders and replace the old version.
* Saving often will help you progress faster.
* If necessary, you can leave important NPCs behind. They will teleport into the next level with you.
* Enemy NPCs spawned by Chaos are gone forever once killed and remain wounded forever once hurt (unless they regenerate health), even if you reload a save, so don't give up on them.
* **Zero Gravity** and **Invert Gravity**: You can stick to the ground as long as you don't jump or move off it. Land in water to avoid fall damage. Landing on slopes can prevent fall damage.
* **Water World**: Only the crowbar, gravity gun, pistol, and crossbow can be used underwater. Drowning damage heals once you leave water. If **Superhot** is on, stay still to minimize drowning damage. If **Supercold** is on, move around to minimize drowning damage. You can't drown in vehicles.
* **Annoying Alyx**: Don't use burst damage weapons such as the shotgun. Alyx can only lose 25% of her health at once and regenerates health, so will take at least 5 hits to kill.
*`portalsopenall.cfg`: Sets `r_portalsopenall`. Force-opens all areaportals. Most users will want to use 1 because if 0, areas of levels may become invisible until you enter them. This was intended to help performance, but Chaos can disrupt this feature due to sequence breaking. Normally the default is 0, but in Chaos, it's 1.
* If you play maps from something that isn't _Half-Life 2/Episode One/Two_, the "Node graph out of date" message will appear every time you go to a new map for the first time. This message is harmless, but if you wish, you can copy the `.AIN` files from the mod as well. It will also stop appearing after you've visited each map a single time, because the mod has now generated its own copy of the node graph. The `.AIN` files are included for _Half-Life 2/Episode One/Two_.
* If you take a weird path through d3_c17_13, you may not activate the strider in the car pit. You will have to kill it before the intended route can continue.
