Psychic Warrior
In 3.5, psychic warriors were people who thought that it was cool to zap people with mind powers, but it would also be nice to be able to cut people in half with a sword. The resulting class was the psychic warrior, a half-fighter, half-psion that focused on self-buffs and boosting his own power through the roof so he could murder faster than everyone else. It worked surprisingly well, given that psionics have no physical components and therefore can be manifested in armor. It had no class features besides manifesting and bonus feats, but that was still enough to make it better than the Fighter (though in 3.5, what wasn't better than the fighter) and make it a tier 3 class.
When Dreamscarred Press took advantage of psionics being Open Gaming License content to make a Pathfinder version, they gave the class actual class features in the form of Paths. A path gives a pair of bonus powers (one at 1st level, the other at 3rd), which can be manifested for free without augments by expending psionic focus and be manifested as part of an attack after level 6. Paths also give a bonus in one of three skills as well a trace (ability active when they have psionic focus) and maneuver (ability that can be used by expending said focus). Eventually a second path may be selected. It also gets to count as having full BAB for the purpose of qualifying for feats.
One notable archetype for the Pathfinder version of the class is Pathwalker. Pathwalker trades several bonus feats, their ability to count as having full BAB, and a late game limited use ability to have multiple trances up for maneuvers like a Path of War class. Pathwalker has a set of exclusive, discipline based, Paths them must take, instead of the normal ones, that are generally (slightly) more narrow in application than the default ones. This gives them 6th level powers and 6th level maneuvers from three disciplines (but they can grab higher level maneuvers with feats), making them quite versatile.
| The Classes of Pathfinder 1st Edition | |
|---|---|
| Core Classes: | Barbarian - Bard - Cleric - Druid - Fighter - Monk Paladin - Ranger - Rogue - Sorcerer - Wizard |
| Advanced Player's Guide: |
Alchemist - Antipaladin - Cavalier Inquisitor - Oracle - Summoner - Witch |
| Advanced Class Guide: |
Arcanist - Bloodrager - Brawler - Hunter - Investigator Shaman - Skald - Slayer - Swashbuckler - Warpriest |
| Occult Adventures: |
Kineticist - Medium - Mesmerist Occultist - Psychic - Spiritualist |
| Ultimate X: | Gunslinger - Magus - Ninja - Samurai - Shifter - Vigilante |