An Unleashed Mind's power is most often an innate force they struggle to understand or control, a reflection of their state of mind and mood projected onto the world around them, often to devastating results. The life of an Unleashed Psion is frequently their journey to control their unruly powers... or one of embracing the destructive powers they grant fully.
What the wellspring of their innate power is varies - they could be a psionic race, born under the influence of distant twisted powers, warped by fey blood, or a herald of something more sinister brushing against the material world. Sometimes their power will show itself in simple applications, but most often their power becomes known and feared when their temper flares.
Their alignment frequently depends on the approach to their powers they have taken, an Unleashed Psion who emphasizes control and restraint, keeping their emotions from running wild and their powers from running rampant will most often be lawful, following strict personal codes. On the other hand, an Unleashed Psion who lets their power run rampant will almost always be chaotic in nature, acting on impulse... with great emphasis.
At 1st level when you select this archetype, you gain the ability to unleash your mind to physically interact with the world around you, granting you the psionic discipline Telekinesis.
Additionally at 1st level, you gain the ability to cast thaumaturgy with your psionic powers. When you cast in this way, you have an additional option:
Starting at 3rd level, you gain a d4 rampage die. Once per turn during your turn when make a damage roll, you can add this rampage die to the damage roll. If you dealt damage during your last turn, your rampage die becomes a d6, increasing with each subsequent turn you deal damage by one step, up to a d12; if you did not deal damage during your last turn or become incapacitated, it becomes a d4 once more. If a maintain a continuous d12 rampage die for more than one minute, you gain a level of exhaustion.
Starting at 6th level, when you deal damage with a Psionic Discipline power you can add your Intelligence modifier to the damage dealt.
Starting at 10th level, the strength of your rampaging mind is such that others' attempts to control it are futile. You gain immunity to charm, fear, and effects that would control your mind while your rampage die is a d8 or more.
Starting at 14th level, when an attack reduces you to zero hit points, you can roll your rampage die. If your roll + your Constitution modifier is higher than the excess damage you took, you are instead reduced to one hit point. You can expend 2 psi points to roll an additional rampage die, adding it to the result.