I'd like to use house rules from Critical Role in my own campaigns, and while we may tweak them once we've tried them, they seem to work well for Matt and his players, so what they use would be a good starting point. I've seen Matt Mercer's homebrew content (as used on Critical Role) mentioned on several forum threads, but aside from the resurrection rules being referred to as "famous" I've not found a lot of detail.
Is there a comprehensive list/details of these rules (or at least of the most notable ones?) If so, where can it be found?
Because I want to start from exactly what they use, I'm looking for something verifiable. That means that rules defined by someone watching the show and working out a best guess on what they are isn't a good answer, while either a purchasable resource (if it's included in the Tal'Dorei Campaign Guide, for example) or something otherwise directly from/endorsed by Matt Mercer himself would be a good answer.
So I'm looking for something that is:
- Not a breach of copyright
- Verifiably what Matt Mercer actually uses/wrote
Best Answer
Some are listed in the Tal'Dorei Campaign Setting (though they may be slightly different from those used in play)
As you guessed, some of the house rules used in Critical Role do indeed appear in the Tal'Dorei Campaign Setting book. However, the book does not clearly distinguish which of the listed house rules or homebrew feats are actually house rules used in Critical Role, or whether the version of something in the book actually matches the version used in actual play during Critical Role.
Michael Liu's answer links to sources on /r/CriticalRole on reddit where some of the Critical Role houserules are listed. Of those, the following ones appear in the Tal'Dorei Campaign Setting as feats:
Matt Mercer allows his characters to drink potions as a bonus action. This appears in the book in the form of the Rapid Drinker feat (p. 109):
Mercer also allows characters to cast multiple spells per turn (without changing their casting times), ignoring the 5e rules limitation around bonus-action spells. This also appears as the Spelldriver feat (p. 109):
The Tal'Dorei Campaign Setting book also has an entire section in the same chapter (Chapter 3) on "Optional Campaign Rules and Guidelines". Within that chapter, it suggests that when running games with larger parties, the DM may want to give out the Rapid Drinker feat (or the equivalent primary benefit) and eventually give out the Spelldriver feat at 8th level. It also lists accelerated downtime mechanics and Matt Mercer's alternative resurrection rules. All of these seem to generally match the house rules listed in Matt Mercer's comment on /r/CriticalRole that Michael Liu's answer links to.
This section is accompanied by the following sidebar:
As such, these optional rules may not perfectly match the CR houserules as used in actual play, but they are a refined version of those houserules.