The last few times I've had a character level up they only got 1 HP .... ??

What am I doing wrong?

A mage beyond level 9 always gains 1HP per level up.

Otherwise, the HP you gain when leveling up is determined randomly if you play with Core Rules difficulty. So you might have had a string of bad luck.

Oh, and another possibility is if you have a low Constitution score maybe... but I'm not too sure how CON works to affect HP gains.

Constitution affects only first nine levels. After that, you get one point per level, and there are no modifiers.

@ Zvijer

Actually, you do get modifiers. My Barbarian with 19 Con was getting 3hp/level after 9th. You get 1pt per level, plus your Constitution bonus.

Yes but thats becouse barbarians are warriors. Here is how it works.

1 HP: Sorcerer, Mage, Special Mage
2 HP: Cleric, Druid, Bard, Thief
3 HP: Ranger, Fighter, Barbarian, Paladin, Monk(I think)

This is after level nine. When you are before you get to roll a dice and add the modifiers.

Dice:

D4: Sorcerer, Mage, Special Mage
D6: Cleric, Druid
D8: Bard, Thief, Monk(I think)
D10: Ranger, Fighter, Paladin
D12: Barbarian

Modifiers:

0-1 CON -5
2-3 CON -4
4-5 CON -3
6-7 CON -2
8-9 CON -1
10-11 CON 0
12-13 CON +1
14-15 CON +2
16-17 CON +3
18-19 CON +4
20-21 CON +5

@ Rutkowski This is for 3E BG use 2E of AD&D the Con works this way


1-14 =0
15 = 1
16 = 2
17 = 3
18 =4
19 =5

and after 19 I...I don't know... :sosad:

Ok I thought it was the same with the modifiers in 2E. Don't play much 2E, 3E is much better.

Ok I thought it was the same with the modifiers in 2E. Don't play much 2E, 3E is much better. Your right

And remember that non-warrior characters have maximum constitution bonus +2.

So, the table seems like this:
3-5 -1
6-14 0
15 +1
16 +2
17 +2 (+3)
18 +2 (+4)
19-20 +2 (+5)
21-23 +2 (+6)
24-25 +2 (+7)