Hackmaster said:
What can GT do for my existing games? I have a homebrew setting standard D&D game and a D20 modern urban fantasy mystery/supernatural horror game.
What can I drop right in there from GT that I will want to use?
Anything to make combat a little more lethal? (Especially to make those modern characters more afraid of guns and werewolves)
Well, yeah, Fight or Flight. Email me privately and I will send you a copy of the Horror PDF.
I would think that
DR10/silver should cover you on werewolves. You could also go
DR10/silver, ballistic but, really, I wouldn't want to do anything to discourage PCs from going into melee with werewolves that, you know, werewolves don't already do.
Most guns in Grim Tales do 2 dice of damage, depending on caliber. Of course, all the rules you need to "design" firearms are there. PCs can be made suitably afraid of guns with... well, big guns and low massive damage thresholds.
Or, even simpler, just require a massive damage save for any ballistic damage (although personally I think it's a little unheroic, even though possible, for someone to be killed by a .22 pistol.)
*Ballistic is a fourth damage type, apart from bludgeoning, piercing, and slashing, so you can do whatever you want with it. I just gave two examples of how to integrate ballistic damage into existing d20 rules systems.