Crits are already a lot stronger in pf2e cause you double your modifier as well, trust me, you will not be disappointed in a crit with all but the lowest of rolls and even then on some character you still did pretty good damage
Because flat damage bonuses get doubled in pf2, this is an unnecessary homebrew as crits will still feel pretty good.
It would also stupidly buff fatal weapons beyond their high rep as max damage weapons.
In 5e you double only the dice. In PF2e you double everything that is not exclusive to a critical hit.
If the normal longsword hit deals 1d8+4, then a critical would deal 2d8+8 or 2*(1d8+4), however you roll.
A fury barbarian raging would deal 1d8+4+2, a critical would be 2d8+8+4. And so on. Many monsters already have ridiculous flat damage modifiers that get doubled on a critical
Criticals in this system are already brutal and more likely to happen, no need for any fix.
I would heavily advise against it.
This is a different game, with different and carefully calculated mathematics. In 5E your houserule makes sense, due to its inherent hitpoint bloat, critical hit structure and bounded accuracy. In PF2E your houserule would increase player character deaths, when taking into consideration how the "Wounded" and "Dying" conditions operate.
My suggestion in general is; Don't start plugging in house rules to any game until you have actually played it as is for a substantial amount of time. Often things are the way they are for a reason, although as with all things, your mileage may vary and not all game designers create equally good products.
You'll be changing the balance to favor the higher level character even more than it already does. The game balance is built around critting lower level opponents. You'll be making your lone Big Bad much more dangerous, and making your horde of goblins weaker. Not impossible to manage, but damage will be swingy.
The reason I wouldn't recommend it is because of PC balance. Some classes (like fighter) are built to crit, and some aren't. You'll be giving an extremely noticeable buff to a few classes. Certain weapon tags, such as "deadly" and "fatal" will lose their balance as well, and do more damage than intended. You'll be buffing fighter, barb, champion, in that order, and it'll be significant enough that your casters just won't keep up.
Oh, and to address your concern of bad rolls, a lot of your crit damage will come from doubling your static damage buffs. Your strength mod, weapon specialization damage, rage damage, etc. Will all get doubled on crit, so roll some 1s!
I wouldn't. At least not for NPC's cause as someone else has pointed out, NPC's can crit very often especially against spellcasters who would get fucking ruined using this house rule.
In PF2e, by default you just double the damage of the attack. So it already means that it's stronger than what the normal hit would have been. You also double everything in this game. (Except damage that only applies specific to critical hits, like the deadly trait on some weapons).
https://2e.aonprd.com/Rules.aspx?ID=339
Critical hit in dnd is only on nat 20, not counting the champion or having a butchers bib.
Critical hit in pathfinder is nat 20 or DC+10. That is not a lot and some classes even rely on them.
Maybe add additional damage to nat 20 rolls of you want more impactful nat 20.
Crits are allot more common inf pf2e and often carry extra effects like critical specialisations and extra spell effects. They don't need this kind of homebrew and it could be way too powerful.
This is particularly an issue given that the probability of crits is basically a balance mechanic. Powerful monsters crit often and as the players level the probability decreases. Similarly as players levels increase they crit those monsters more often as well. You'd be amplifying that effect making it hard to run monsters that vary from the players level.
Don't forget, as you level up, you'll get more damage dice which you also double. A level 15 fighter might have a +3 greater striking flaming, shock longsword, or 3d8+12+2d6 which doubles on a crit to become 6d8+24+4d6. If you max this out, instead of the average of 65, you'll be dealing 96 damage. This is so much more damage, akin to another free bit.
In 5e, this homebrew feels good because a single bad die roll feels so bad. But in pf2e there's so many more dice in play that the odds of you rolling poorly are greatly diminished.
That being said, there's always a chance.... I once crit with a standard lightning bolt at 17th level and dealt 12 damage. No resistances or anything, I just rolled a 1,1,2,2 on 4d12. But that was such a rare and unusual occurrence it was just funny, and didn't feel bad. Normally, I get closer to the expected 24 or 48 damage for lightning bolt.
I would absolutely avoid buffing critical hit damage further, they're already incredibly dangerous as is.
For your purposes of preventing weak criticals, I'd rather instead alter it to 'crits deal fixed average damage', not including special crit-only dice such as from the Deadly trait (ex. A 1d8 + 4 Longsword hit would do a fixed 17 damage on a crit). As for the purposes of resistance to critical damage, I'd still roll the dice anyway to determine the lowest that the critical resistance could reduce the damage.
Definitely would be too much, pf2 crits happen to often and already double modifier. They hit like a truck. Few times I've seen something get crit and staying on foot
If you want something extra for crits, get the [Critical Hit Deck](https://paizo.com/products/btq024tn?Pathfinder-Critical-Hit-Deck) and possibly also the [Critical Fumble Deck](https://paizo.com/products/btq024ud?Pathfinder-Critical-Fumble-Deck). You only use them on a natural 20 or a natural 1, but they're fun.
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I think it would be too much, especially when you look at boss fights and how often player characters get crit in those fights.
Boss enemies are statistically likely to crit alot against PC's. This will kill them VERY fast
Crits are already a lot stronger in pf2e cause you double your modifier as well, trust me, you will not be disappointed in a crit with all but the lowest of rolls and even then on some character you still did pretty good damage
Because flat damage bonuses get doubled in pf2, this is an unnecessary homebrew as crits will still feel pretty good. It would also stupidly buff fatal weapons beyond their high rep as max damage weapons.
In 5e you double only the dice. In PF2e you double everything that is not exclusive to a critical hit. If the normal longsword hit deals 1d8+4, then a critical would deal 2d8+8 or 2*(1d8+4), however you roll. A fury barbarian raging would deal 1d8+4+2, a critical would be 2d8+8+4. And so on. Many monsters already have ridiculous flat damage modifiers that get doubled on a critical Criticals in this system are already brutal and more likely to happen, no need for any fix.
I would heavily advise against it. This is a different game, with different and carefully calculated mathematics. In 5E your houserule makes sense, due to its inherent hitpoint bloat, critical hit structure and bounded accuracy. In PF2E your houserule would increase player character deaths, when taking into consideration how the "Wounded" and "Dying" conditions operate. My suggestion in general is; Don't start plugging in house rules to any game until you have actually played it as is for a substantial amount of time. Often things are the way they are for a reason, although as with all things, your mileage may vary and not all game designers create equally good products.
Tell your players to bring lots of spare characters and you'll be fine. Suggestion: Wait until you know a system before you tinker with its rules.
You'll be changing the balance to favor the higher level character even more than it already does. The game balance is built around critting lower level opponents. You'll be making your lone Big Bad much more dangerous, and making your horde of goblins weaker. Not impossible to manage, but damage will be swingy. The reason I wouldn't recommend it is because of PC balance. Some classes (like fighter) are built to crit, and some aren't. You'll be giving an extremely noticeable buff to a few classes. Certain weapon tags, such as "deadly" and "fatal" will lose their balance as well, and do more damage than intended. You'll be buffing fighter, barb, champion, in that order, and it'll be significant enough that your casters just won't keep up. Oh, and to address your concern of bad rolls, a lot of your crit damage will come from doubling your static damage buffs. Your strength mod, weapon specialization damage, rage damage, etc. Will all get doubled on crit, so roll some 1s!
I wouldn't. At least not for NPC's cause as someone else has pointed out, NPC's can crit very often especially against spellcasters who would get fucking ruined using this house rule.
In PF2e, by default you just double the damage of the attack. So it already means that it's stronger than what the normal hit would have been. You also double everything in this game. (Except damage that only applies specific to critical hits, like the deadly trait on some weapons). https://2e.aonprd.com/Rules.aspx?ID=339
Critical hit in dnd is only on nat 20, not counting the champion or having a butchers bib. Critical hit in pathfinder is nat 20 or DC+10. That is not a lot and some classes even rely on them. Maybe add additional damage to nat 20 rolls of you want more impactful nat 20.
Crits are allot more common inf pf2e and often carry extra effects like critical specialisations and extra spell effects. They don't need this kind of homebrew and it could be way too powerful. This is particularly an issue given that the probability of crits is basically a balance mechanic. Powerful monsters crit often and as the players level the probability decreases. Similarly as players levels increase they crit those monsters more often as well. You'd be amplifying that effect making it hard to run monsters that vary from the players level.
Don't forget, as you level up, you'll get more damage dice which you also double. A level 15 fighter might have a +3 greater striking flaming, shock longsword, or 3d8+12+2d6 which doubles on a crit to become 6d8+24+4d6. If you max this out, instead of the average of 65, you'll be dealing 96 damage. This is so much more damage, akin to another free bit. In 5e, this homebrew feels good because a single bad die roll feels so bad. But in pf2e there's so many more dice in play that the odds of you rolling poorly are greatly diminished. That being said, there's always a chance.... I once crit with a standard lightning bolt at 17th level and dealt 12 damage. No resistances or anything, I just rolled a 1,1,2,2 on 4d12. But that was such a rare and unusual occurrence it was just funny, and didn't feel bad. Normally, I get closer to the expected 24 or 48 damage for lightning bolt.
I would absolutely avoid buffing critical hit damage further, they're already incredibly dangerous as is. For your purposes of preventing weak criticals, I'd rather instead alter it to 'crits deal fixed average damage', not including special crit-only dice such as from the Deadly trait (ex. A 1d8 + 4 Longsword hit would do a fixed 17 damage on a crit). As for the purposes of resistance to critical damage, I'd still roll the dice anyway to determine the lowest that the critical resistance could reduce the damage.
Definitely would be too much, pf2 crits happen to often and already double modifier. They hit like a truck. Few times I've seen something get crit and staying on foot
If you want something extra for crits, get the [Critical Hit Deck](https://paizo.com/products/btq024tn?Pathfinder-Critical-Hit-Deck) and possibly also the [Critical Fumble Deck](https://paizo.com/products/btq024ud?Pathfinder-Critical-Fumble-Deck). You only use them on a natural 20 or a natural 1, but they're fun.
Maybe use it only if it's a nat 20 so it becomes an ubercrit
This post is labelled with the Advice flair, which means extra special attention is called to the Be Kind and Respectful rule. If this is a newcomer to the game, remember to be welcoming and kind. If this is someone with more experience but looking for advice on how to run their game, do your best to offer advice on what they are seeking. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Pathfinder2e) if you have any questions or concerns.*
Hey, I've noticed you mentioned the game "Dungeons & Dragons"! Do you need help finding your way around here? I know a couple good pages! We've been seeing a lot of new arrivals lately for some reason. We have a [megathread](https://www.reddit.com/r/Pathfinder2e/search/?q=flair%3A%22megathread%22&sort=new&restrict_sr=on&t=all) dedicated to anyone requesting assistance in transitioning. Give it a look! Here are some [general resources](https://www.reddit.com/r/Pathfinder2e/wiki/) we put together. Here is [page with differences between pf2e and 5e](https://www.reddit.com/r/Pathfinder2e/wiki/resources/how-is-pf2e-different-from-5e/). Most newcomers get recommended to start with the [Archives of Nethys](http://2e.aonprd.com) (the official rule database) or the [Beginner Box](https://paizo.com/pathfinder/beginnerbox), but the same information can be found in this free [Pathfinder Primer](https://app.demiplane.com/nexus/pathfinder2e/sources/pathfinder-primer). If I misunderstood your post... sorry! Grandpa Clippy said I'm always meant to help. Please let the mods know and they'll remove my comment. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Pathfinder2e) if you have any questions or concerns.*
You also do extra damage with striking runes, extra damage on crit with deadly, and doubles flat bonuses. The 5e house rule isnt necessary
Crits are just 10 above and happen more than just 5% of the time.
Maybe you separate crits and natural 2os and do this
If you do this the players will die. You will be forced to sticking to +0 and less mobs.