While 50Kg is prolly a lot of weight to carry around, if you'd like to increase, this is what worked for me.

Overview
1. Make a backup first! (game and save games)
2. Unpack game config files
3. Modify three games files

Details
1. Download unpacker utility from (works as of June 2025): https://metacognix.com/files/stlkrsoc/index.html#SoCPUP

2. Copy `SoCPUP.exe` to same folder where game is installed `...\STALKER Shadow of Chernobyl`

3. Create `gamedata` folder within the game folder. This is where the editable files will be extracted to. These will override anything that's in the packed files.

4. Extract the gamedata.* files to the `gamedata` folder. These need to be extracted in order as later files may contain updates to previous files. In my experience though, the weight-related config files are found in `gamedata.db0`. If you want to extract and modify everything, extract `gamedata.db0` through, `*.db9`, followed by `*.dba` through `*.dbd`. (0-9, a-d)

The `-ro` flag will keep things read only--it will show what it's going to extract, but won't make any changes. Remove `-ro` when you're satisfied.

The `-extract` flag will only extract packed files from the given path. This command only extracts config files.

`socpup -ro gamedata.db0 -extract config -dir gamedata`

5. Enable the gamedata override folder. In the game directory, open the `fsgame.ltx` file and flip the `$gamedata` value to true. This is typically the second line in the file. It should look like this when you're done:

`$game_data$ = true| true| $fs_root$| gamedata\`

6. Increase allowed weight.

In `gamedata/config/system.ltx` change `max_weight` to a larger value:

`max_weight = 200`

In `gamedata/config/creatures/actor.ltx` change these two values:

`max_walk_weight = 220`
`max_item_mass = 200.0`

NOTE: `max_weight` and `max_item_mass` should prolly be identical values. `max_walk_weight` is the weight you can normally walk without be slowed down, and is usually a little higher than the other two values.

7. Delete any of the other `gamedata` files you have not edited. This will keep loading performance from being impacted.

You can use this approach to modify any of the game settings or content.

Good explanation.

One caution: The most recent version of a file must be used. The latest config\creatures\actor.ltx is in gamedata.dbb, and the latest version of config\system.ltx is in gamedata.dbc for SoC versions 1.0005 and 1.0006.

While actor.ltx is pretty much the same, system.ltx changes the version number (current_server_entity_version) to 6 in gamedata.dbb (added in SoC 1.0001) from 5 in gamedata.db0, and changes it to 7 in gamedata.dbc (added in SoC 1.0005).

This value is used by the Lua scripting engine to tell the game to expect data changes, allowing the game to update older saves to use the newer formats by recognizing and processing an older save when loaded, then adding the newer data which would be saved in the newer format with the updated value of current_server_entity_version.

In short, use config\system.ltx from gamedata.dbc for SoC version 1.0006, which is currently used in the OG game. I'm not speaking for the EE version.