Free beta. No mod loader needed

Install Worldfall

One file in WorldBox's own mods folder. The mod is free; donations on Ko-fi are optional and don't unlock anything.

In Steam, right-click WorldBox, then Manage > Browse local files.
Open worldbox_Data\StreamingAssets\mods (make the mods folder if it isn't there).
Put Worldfall.dll in that folder.
Start WorldBox, open Settings and turn on Experimental Mode.
Restart WorldBox.

In Steam, right-click WorldBox, then Manage > Browse local files.
Right-click the WorldBox app and choose Show Package Contents.
Go to Contents/Resources/Data/StreamingAssets/mods (make the mods folder if it isn't there) and put Worldfall.dll there.
Start WorldBox, open Settings and turn on Experimental Mode.
Restart WorldBox. On an Apple Silicon Mac, the NeoModLoader version works better.

Install NeoModLoader once by hand: subscribing to it on the Workshop only downloads it. Get NeoModLoader.dll, or copy it from steamapps/workshop/content/1206560/3080294469 if you subscribed.
In Steam, right-click WorldBox, then Manage > Browse local files, and put it in worldbox_Data/StreamingAssets/mods (Windows, Linux, Steam Deck). On a Mac: Show Package Contents on the app, then Contents/Resources/Data/StreamingAssets/mods. Make the mods folder if it isn't there.
Start WorldBox, turn on Experimental Mode in Settings, and restart.
Subscribe to Worldfall on the Steam Workshop, or drop Worldfall_NML.zip in the Mods folder NeoModLoader made beside the game. Start WorldBox: Worldfall shows in NeoModLoader's mod list.
Android: set up NeoModLoader for Android first, then put the Worldfall folder from Worldfall_NML.zip in Android/data/com.mkarpenko.worldbox/Mods. Early: tried on few phones.
Use one install, not both: if Worldfall.dll is also in StreamingAssets/mods, that one runs instead.

Is it safe?

Only download it from this page. The zip holds three files: Worldfall.dll, an install guide and the licence. No installer, no mod loader, no admin rights.
It only goes online when you ask. Only when you host or join a multiplayer game, or browse packs in F2 > Mods. Otherwise it only runs inside WorldBox, and writes its log, settings and screenshots to WorldBox's own save folder.
Why an antivirus might warn. To turn WASD into first-person movement, the mod changes a few of WorldBox's own functions in memory while the game runs. Some antivirus tools flag that technique. Nothing on disk is changed: delete the DLL and the game is back to normal.
Check your download. Compare its SHA-256 with these (Windows: certutil -hashfile Worldfall.zip SHA256), or scan it on virustotal.com.

Worldfall.zip: 29ecd204f6e009a570a121d25455363327957ee2fd6e86bc88190a7270202588
Worldfall_NML.zip: 05873104a6004cccb0dc63bb597aae6f9ea45851c3bdea681fa92a6e33bf21f5
Worldfall.dll: 6ed462670ced8b33cce6c5a639c50158aac85dc99ff03d0b1b7669302db12770

This is a beta build, so you may run into bugs; reports on the Workshop page help. WorldBox also turns Experimental Mode off after every game update: if the mod stops loading, turn it back on and restart.

Download beta 0.9.8 (Worldfall.zip, 50 MB) NeoModLoader version (Worldfall_NML.zip, 50 MB) Steam Workshop (NeoModLoader) Support on Ko-fi

Need an older version? Every earlier release is in the update log.

Key	In first person
`G`	Take control of the selected creature (and let go again)
Mouse, `WASD`	Look around, walk or swim; hold `Shift` to sprint
Left click	Attack, or hold on a tree, rock or crop to chop, mine or harvest
Right click	Guard; raise it as a blow lands to parry
`E`	Talk, open a door, board a boat. Hold it for everything else
Hold `Q`	Tools: torch, compass, food, bandage
`Tab`	Your bag, crafting, magic and people
`M`	The world: map, news, war, orders, council
`Y`	Plan your town
`X`	Your kind's own ability
Middle click	Take over the creature you look at
`V` `F`	On the map: the 3D god view; fly a free camera
`F1` `F2`	All the controls; the mod's settings