This allows to push your Character Level up to 29. Not very useful in the main campaign, but can be fun in Beneath The Stolen Land - you can easily get to level 23-24 there, and get your Class Level 20 Capstone even with some dips.

It does _not_ allow to get more than 20 level in any given class. You need multi-classing to go beyond Level 20.

Experience required is described in D20PFSRD: Advancing Beyond 20th Level. Going to Level 30 requires more than 2^31 XP, which is more than the game can handle, hence the name Character Level 29. As you already need over a billion XP to get to Level 29, it's not much of a restriction.

You get an extra feat at odd-numbered character level, they are displayed backward from Level 20 in the even-numbered levels. It's not pretty but it fits in the UI w/o too much hacking.

Caster Level should stack, with some extra spell-per-day, for Cleric, Wizard, Druid, Sorcerer, Magus, Bard and Inquisitor when using a stacking Prestige class. Beware - only (Sorcerer or Wizard)+ArcaneTrickster has been tested (a bit).

BAB stacks, so a Fighter 20/Paladin 2 has +22 BAB for instance.

Skills can go up to your CL, as usual. You get an extra ability point at Levels 24 & 28, as usual.

For those wanting to go beyond the rules, version 0.7.0 introduces an alternate XP progression table, much more linear than the exponential table from Paizo. This allows to go up to level 64 in the ~2 billions XP limit. Feat stops after level 39 to avoid crashing the UI, but you still get an Ability point every 4 levels. And Caster levels still stack, so you can e.g. stack Sorcerer, Arcane Trickster, Mystic Theurge & Eldritch Knight (plus a level of Rogue & Fighter and some Clerics) and get to arcane caster level 49... (tables below).

Update: version 0.8.0 adds a couple toggle, one to let pet progress beyond their lvl16 limit (e.g. stacking ranger with druids), and another to change the spell progression tables (fewer max-level spells at first, but more spells overall spread over the spell levels).

Install as usual with UnityModManager.

Standard D20PFSRD XP Table:

• 19 -- 2 550 000
• 20 -- 3 600 000
• 21 -- 5 700 000
• 22 -- 9 900 000
• 23 -- 18 300 000
• 24 -- 35 100 000
• 25 -- 68 700 000
• 26 -- 135 900 000
• 27 -- 270 300 000
• 28 -- 539 100 000
• 29 -- 1 076 700 000
  

Non-standard, quicker, gets to higher level XP Table:

• 19 -- 2 550 000
• 20 -- 3 600 000
• 21 -- 5 700 000
• 22 -- 9 900 000
• 23 -- 16 200 000 <- changes start here
• 24 -- 24 600 000
• 25 -- 35 100 000
• 26 -- 47 700 000
• 27 -- 62 400 000
• 28 -- 79 200 000
• 29 -- 98 100 000
• 30 -- 119 100 000
• 31 -- 142 200 000
• 32 -- 167 400 000
• 33 -- 194 700 000
• 34 -- 224 100 000
• 35 -- 255 600 000
• 36 -- 289 200 000
• 37 -- 324 900 000
• 38 -- 362 700 000
• 39 -- 402 600 000
• 40 -- 444 600 000
• 41 -- 488 700 000
• 42 -- 534 900 000
• 43 -- 583 200 000
• 44 -- 633 600 000
• 45 -- 686 100 000
• 46 -- 740 700 000
• 47 -- 797 400 000
• 48 -- 856 200 000
• 49 -- 917 100 000
• 50 -- 980 100 000
• 51 -- 1 045 200 000
• 52 -- 1 112 400 000
• 53 -- 1 181 700 000
• 54 -- 1 253 100 000
• 55 -- 1 326 600 000
• 56 -- 1 402 200 000
• 57 -- 1 479 900 000
• 58 -- 1 559 700 000
• 59 -- 1 641 600 000
• 60 -- 1 725 600 000
• 61 -- 1 811 700 000
• 62 -- 1 899 900 000
• 63 -- 1 990 200 000
• 64 -- 2 082 600 000