Using an old 3.5 module an npc and a PF character both need to try to notice an ambush before they walk into it. The 3.5 npc rolls 1d20+ Spot, the PF character rolls 1d20+ perception. Both compare their result to the DC.
Running a 3.5 module using PF requires zero adaptation.
Exactly.
I pull up a griffon off of the SRD for my pathfinder game...what do I need to change?
Size/Type:
Large Magical Beast
Hit Dice:
7d10+21 (59 hp)
Initiative:
+2
Speed: 30 ft. (6 squares),
fly 80 ft. (average)
Armor Class: 17 (-1 size, +2 Dex, +6 natural), touch 11,
flat-footed 15
Base Attack/Grapple:
+7/
+15
Attack:
Bite +11 melee (
2d6+4)
Full Attack:
Bite +11 melee (
2d6+4) and 2
claws +8 melee (
1d4+2)
Space/Reach: 10 ft./5 ft.
Special Attacks:
Pounce,
rake 1d6+2
Special Qualities:
Darkvision 60 ft.,
low-light vision,
scent
Saves: Fort
+8, Ref
+7, Will
+5
Abilities: Str 18, Dex 15, Con 16, Int 5, Wis 13, Cha 8
Skills:
Jump +8,
Listen +6,
Spot +10
Feats:
Iron Will,
Multiattack,
Weapon Focus (bite)
Environment: Temperate hills
Organization: Solitary, pair, or pride (6-10)
Challenge Rating: 4
Treasure: None
Alignment: Always neutral
Advancement: 8-10 HD (Large); 11-21 HD (Huge)
Level Adjustment: +3 (cohort)
Size? No change
HD? No change
Init? No change
Speed? No change
Armor Class? No change
BAB/Grapple? Rename Grapple CMB.
Attack? No change
Full Attack? No change
Space/Reach? No change
Special Qualities? No change
Saves? No change
Abilities? No change
Skills? Jump becomes Athletics, 3+1/2HD+STR is how I've been doing it...+10. Listen/Spot become Perception, which is +8.
Feats? No change
Environment? No change
Organization? No change
Challenge Rating? No change
Treasure? No change
Alignment? No change
Advancement? No change
Level Adjustment? No change
So I just converted a standard 3.5 creature to pathfinder and it took...1 minute? Less, even if I didn't type out all of the "no change" text. I generally do this on the fly, taking 15 seconds to calculate the skill changes if it comes up since so often I don't even need skills for monsters.
Yes, it would be more difficult if it was an awakened Griffon with four levels of cleric and three of wizard, but still it would take very little time.
{edit: formatting fixes}