I made a TW4e hack from this excellent universal sourcebook:
https://www.drivethrurpg.com/product/92589/Trauma
It is a bit long to explain what I did here, so I have a pdf explaining how to use it for TW4e games run on Foundry VTT v.11.
I have also done critical "items" and roll tables for Foundry.
Please note that these tables alone will not help you: YOU WILL NEED THE ORIGINAL TRAUMA SOURCEBOOK FOR THESE TO BE OF ANY USE!
So PM me if you are interested in how I adopted the "Trauma" -sourcebook to TW4e.
If you want:
- Critical severity to differ between a rifle butt and .50 to the head
- Terrified players who do not know what the damage done actually is before a doctor diagnoses the wound
- More linear healing process than on/off wound
- Wounds that need to be treated with proper equipment and gear
- Situations, where there is not much more to do than wait for the lingering death due to microsurgery not being available
- Gory criticals
AND you run your games with Foundry, you might be interested in this one...
And if you do P&P I can still ofc. mail you the pdf on how I adopted Trauma for my games.