Good job. I was checking it against CoC6e an d I can see where they refer to the earlier version to do an if about adding the d10.
Also, I get an Error when I delete anything off the Combat Tracker. [string "ct/scripts/ct_entry.lua"]:99: attempt to index global 'windowlist' (a nil value)
OK, I did make some changes to the extension.
DeltaGreen.ext
I set the "Foreign Language" base to 0, instead of 50. I fixed the ability to talk in foreign languages, that was present in CoC6e. (Apparently, changing the name from "Own Language" and "Other Language" breaks the manager_language2.lua.
Altered references from KEEPER to HANDLER.
And I changed ability, skill, and combat rolls to set the MAX ability 99. Bonuses, were allowing the skill to set higher. I also made an adjustment for Unnatural abilities (Handler's Guide p.188) to have the correct Criticals.
I also added images, to make it less like CoC and more like DG. But I broke those out as a small Theme.
Delta Green Theme
Attachment 36068