This is an old revision of the document!
http://www.pathguy.com/d20modern.htm is a very, very useful site for trying out different types of character concepts. Not all of the material presented there is used here and there is additional material here that is not used there.
ABILITY MODIFIERS
Score Mod
1 -5
2-3 -4
4-5 -3
6-7 -2
8-9 -1
10-11 +0
12-13 +1
14-15 +2
16-17 +3
18-19 +4
20-21 +5
22-23 +6
24-25 +7
etc. etc.
EXPERIENCE AND LEVEL BENEFITS
Class Cross-Class
Character Skill Max Skill Max Ability
Level XP Ranks Ranks Feats Increases
1st 0 4 2 1st -
2nd 1,000 5 2 ½ - -
3rd 3,000 6 3 2nd -
4th 6,000 7 3½ - 1st
5th 10,000 8 4 - -
6th 15,000 9 4½ 3rd -
7th 21,000 10 5 - -
8th 28,000 11 5½ - 2nd
9th 36,000 12 6 4th -
10th 45,000 13 6½ - -
11th 55,000 14 7 - -
12th 66,000 15 7½ 5th 3rd
13th 78,000 16 8 - -
14th 91,000 17 8½ - -
15th 105,000 18 9 6th -
16th 120,000 19 9½ - 4th
17th 136,000 20 10 - -
18th 153,000 21 10½ 7th -
19th 171,000 22 11 - -
20th 190,000 23 11½ - 5th
21st 211,000 24 12 8th -
22nd 234,000 25 12½ - -
23rd 260,000 26 13 - -
24th 286,000 27 13½ 9th 6th
25th+ +26,000 Lvl +3 Lvl+3 1/3 1/4
+(1000/3 Lvls) 2
Perks and flaws provide a hero with advantages and disadvantages. A perk is usually good for a hero; a flaw is usually negative in some way. No hero is required to purchase a perk or select a flaw, though she may have perks or flaws assigned to her as the campaign progresses.
Perks and flaws not only present the character with advantages and disadvantages, but offer opportunities for good role-playing. The GM may award an extra Character Point (see below) to a hero at the end of an adventure for role-playing her perks or flaws particularly well.