Is PF2e worth picking up? Our group has been using 5e (mostly as dndbeyond is convenient) for our past couple campaigns.
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Yes, but I would hold off on buying any rulebooks until the remaster comes out. All of the rules are free online, and the Pathbuilder app/website is very helpful in seeing which options are available for you. If you want a good starting point, I recommend an adventure path, which is a 3 or 6 book campaign that takes you from levels 1-20 (six book) or levels 1-10 or 10-20 (three books). They're much better than the published adventures for some other games, since Paizo's history is in writing adventures, and they don't require much work beyond what is in the book for a satisfying story and adventure. Those are fine to buy, since they are compatible with the new version and they will not be reissued later. Same with setting materials, which are extensive and have a good amount of detail on various places in the world. I'd try things out in roll20 or foundry, which have the base rules integrated for free, and see if you like it.
IMO, yes. When I want a modern D&D-type game (i.e., heroic high fantasy, somewhat crunchy, focused on set piece encounters) I'd reach for PF2e over D&D5e any day. It works as intended, give players more interesting choices, it's way easier to GM, and despite seeming way crunchier at first blush, the rules are much smoother in play. Plus, all the rules are available for free online, with the express permission of Paizo. It's ultimately a matter of personal preference, so you may or may not like it, but I'm at least confident saying it's a well-made system that's worth checking out.
Like StarPupil said, there's a new revision coming out soon, so I'd wait until then. It's still 2e, and will still be compatible with everything, but they're making some minor tweaks, including some errata, and scrubbing any little bits that might still depend on the OGL. If you like PDFs (which Paizo actually makes and sells, unlike 5e!), you can also keep an eye out for Humble Bundles. There are occasionally some great Pathfinder 2e bundles, which tend to include the core rulebooks and a ton of other stuff, including full adventure paths.
If you want deeper rules for things, PF2e is good. If you want simpler and more story-focused rules, picking up Index Card RPG or Knave might be good.
I like it as a direct replacement and if you're interested in giving it a peek you can check out the entire ruleset with no Pathfinder Beyond subscription needed. now excuse me as i vanish back into the pathfinder free marketing dimension, eheheheh
Dare to explore the world of classless role-playing. Fate, Savage Worlds, Cortex. Take a walk on the wild side.
I personally think so. It is in many ways similar to 5e but a bit denser on rules. It feels like the designers really wanted to make sure that there were no weird corner cases. And while there is a lot of them, the rules all seem very logical and consistent. So when playing it feels a bit more "mechanical" or "game-y" but also less wonky than 5e can be. It is a somwhat different experience than 5e and the rules are available for free at Archive of Nethys. But if you should pick it up really depends on whether your group is unsatisfied with DnD or itching for something new. Our group changed over after trying a one shot and because our DM was getting a bit bored with 5e.
Fighters are so good, they're basically the Champion subclass of 5e, but their expanded crit range is also an expanded hit range, twice as big, and scales with every accuracy buff and AC debuff you or your team puts on your enemies. Team up with a bard and you've got something stupid like a 12-20 crit range on on-level enemies. Team up with a wrestler and you've got reaction attacks to ply that range on.
They are also simultaneously the battlemaster fighter, eldritch knight, and whatever else you want to tack on if you'd like, or none of them if you want to keep it simple.
Don't forget that crits are actually GOOD in PF2e because they multiply all damage instead of just the base weapon die.
Unless you're talking about the playtest, DnD you double all the damage dice, not just the base weapon dice. Sneak attack, smites, anything that's not locked away behind a separate saving throw (like poisons) or just a flat damage boost (like +5 to STR) all gets doubled.
PF2e is great though, would love if one of my games switched over some time.
And of course, what weapon you're holding can further modify weapon crits. Picks do more direct damage, axes do cleave damage, hammers knock foes on their ass, fists can knock the wind out of enemies, giving them less actions, etc.
I'm particularly fond of bows, which can pin enemies to a surface, its really good when combined with a teammate who can knockback enemies with a club or shield crit or just a shove.