Wonder if anyone knows how similar the Achtung! Cthulhu version of 2d20 is the one used by Fallout?
The reason I ask is that the Fallout 2d20 ruleset is now available on Fantasy Grounds. If there was not too big of a difference I was thinking may I could use that till A!C is release on FG.
The differences are quite significant, Fallout 2d20 is in it’s core very different from A!C. So much so, as if they are using a totally different game system - which they basically are.
2d20 is not a generic rules set with a strong core and some setting specific add-ons like Fate or Savage Worlds. Each 2d20 RPG is adapted in the core elements of what makes a character, how damage works, how character progression works, etc.
Fallout 2d20 is special (and SPECIAL, which adds to make it special, too) in that it has a level-based character development, very high detail in damage resolution, different combat resolution, etc. compared to most other 2d20-based RPGs.
It is probably easier to use the Conan Fantasy Grounds adaptation than the Fallout one for A!C, as Conan is a little bit closer to A!C.