Can Investigator use Rogue Archetypes‎?

[Zautos']

So can a Investigator use Kitsune Trickster (Rogue; Kitsune.
It replaces things that the investigator have on the same levels as the rogue

[blackbloodtroll]

No.

Investigator is it's own class, with it's own archetypes.

[Trekkie90909]

You can multi class investigator and rogue, thus unlocking access to rogue archetypes. bbt is correct, investigators have their own archetypes.

[Secret Wizard]

I'd let you do it in a homebrew game though. It's literally the same thing.

[blackbloodtroll]

Secret Wizard wrote:

I'd let you do it in a homebrew game though. It's literally the same thing.

No.

They really are not.

[Milkshaketeer]

I know I'm a little late to the party here, but what is the reasoning behind limiting the Investigator from compatible Rogue archetypes?

An Investigator has the Trapfinding and Trap Sense abilities that a Rogue does at the levels a Rogue does, and there are Rogue archetypes that only modify these class features.

What bars an archetype from being applied to a class that matches it? The only other place I can see core class features being this close is with the Ninja and Samurai alternate classes that can take archetypes from Rogue and Cavalier, respectively.

It makes sense flavor-wise that an Investigator can use the archetypes of one of its parent classes, and it seems intended that they can when the features are the same.

Relevant (Equivalent?) Class Features:

Rogue's Trapfinding wrote:

A rogue adds 1/2 her level to Perception skill checks made to locate traps and to Disable Device skill checks (minimum +1). A rogue can use Disable Device to disarm magic traps.

Rogue's Trap Sense wrote:

At 3rd level, a rogue gains an intuitive sense that alerts her to danger from traps, giving her a +1 bonus on Reflex saves made to avoid traps and a +1 dodge bonus to AC against attacks made by traps. These bonuses rise to +2 when the rogue reaches 6th level, to +3 when she reaches 9th level, to +4 when she reaches 12th level, to +5 at 15th, and to +6 at 18th level. Trap sense bonuses gained from multiple classes stack.

Investigator's Trapfinding wrote:

An investigator adds 1/2 his level to Perception skill checks made to locate traps and to Disable Device checks (minimum 1). An investigator can use Disable Device to disarm magical traps.

Investigator's Trap Sense wrote:

At 3rd level, an investigator gains an intuitive sense that alerts him to danger from traps, granting him a +1 bonus on Reflex saving throws to avoid traps and a +1 dodge bonus to AC against attacks by traps. At 6th level and every 3 levels thereafter, these bonuses increase by 1 (to a maximum of +6 at 18th level).

[MrCharisma]

So the most basic argument is: "You can't because the rules don't say you can". This is how Pathfinder works, if it doesn't specifically allow something then you can't do it.

If you're looking for a better explanation than that, Balance is probably the best reason. Archetypes are designed to complement the existing abilities of a specific class, and giving them to a different class changes the balance of what they're swapping out, even if they're swapping out the same abilities.

Let's take a look at the KITSUNE TRICKSTER archetype that the OP mentioned.

First, you lose Trapfinding in exchange for getting to use INT for all the basic social skills. This is much more powerful for an Investigator, since they have more reason to invest in INT anyway. An Investigator also has a lot more tools available to buff those skill-checks to even higher levels, so giving them this buff makes them overwhelmongly dominant in social encounters.

Next, you lose Trapsense in exchange for the ability to cast Charm Person. This is really more of a magic buff to the previous ability, but since the Investigator likely has a much higher bluff/diplomacy they should be able to convince their target to do more than the Rogue would.

When you look at the class as a whole, the Investigator is generally stronger than the Rogue. There are archetypes that try to make up for the Rogue's shortcomings, and an archetype that buffs the rogue might be seen as balanced, while giving the same buffs to an investigator would tip the scales to overpowered.

EDIT: Sorry for spelling/grammar errors, did this on my phone and I had to rush off before I edited it. Hopefully fixed any mistakes now.

[David knott 242]

It is rare to even see an archetype for which more than one class (not counting alternate classes) has matching class features to replace.

Of course, the corresponding investigator archetype would be a simple thing for a homebrew to implement -- just take the original archetype and globally replace "rogue" with "investigator". Done.