In 2069 humanity sent its first ship into interstellar space.  Up to this point humanity used ships that were too slow too travel to other star systems before running out of fuel.  With the invention of Psitech, technology that could work with a mind to amplify its effects, humanity was able to build a ship that was several times faster than previous ships.

Once outside the system, however, they were intersected by an alien ship which also used Psitech, though their Psitech was much more advanced.  They were members of a non-profit organization
called the Psionic Corporate, or Psicorp.  They provide many services to the people of the galaxy, including an encyclopedia of star systems and the over 10,000 sapient species in the galaxy, first contact and continued contact with species that are far from the standard bipedal, humanoid form, archeology, and the study of psionics in the various species.  They had been studying the primitive human race for hundreds of years and were here to help us transition into an interstellar race.

They classify humanity as a species with moderate potential, as some combinations of genes lead to strong psionic potential, and some combinations lead to little to no psionic potential.  They offer to teach humans to safely use psitech, as the psitech that they had just invented worked by using similar psionic abilities to amplify the effect of the device.  For example, telekinesis could amplify a warp field, electrokinesis could amplify a reactor, and telepathy could amplify a communications array.

Psionic abilities are classified into 5 categories, though only 4 of them can be used be the vast majority of species, including humans.  They also have five classes of proficiency each, each class of which allows the person to do more complicated things with their abilities.

[hider=Telekinesis:]
The movement of things with the mind.  Users may have an affinity for a specific type of matter, which allows them to manipulate that type of matter more easily, but weakens their ability to manipulate other things.  Users are known as Telekinetics.
Class one restricts the user to pushing an object with what is essentially a phantom hand, putting stress on the item.  It is limited by the person's ability to distinguish between different things with their senses.  At a maximum strength of 10, it can move approximately one tonne, at up to a two meters in diameter, though these limits depends on the user. 
Class two allows a person to move things with a field of energy, and gives them a sixth sense for detecting the location of matter.  Level two is limited to one tonne as well, though it doesn't stress the item's integrity, and is limited by their ability to sense different objects with their sixth sense, down to the atomic level.
Class three gives a user the ability to establish patterns in their ability, which runs without much focus being necessary.  This allows them to move multiple items at the same time without having to consciously split their attention.   It is limited merely by the person's internal energy, mental discipline, and sixth sense.
Class four stabilizes the power, giving a person the ability to move heavier and larger items.  Limit increases to 10 tonnes and five meters, though it drastically decreases the movement speed.
Class five allows a person to destabilize their power, drastically increasing the destructive capacity of it, as it stresses the integrity of any item that it touches.
[/hider]
[hider=Telepathy:]
The ability to send information directly between minds.  Users are known as Telepaths.
Class one allows a person to sense emotions.  At a strength of one the two person's minds must be very close, such as their heads touching.  At a strength of two, any physical contact will work.  At three, they must be within a few meters.  At ten they must be within a kilometer or so.
Class two allows the transfer of basic information about the other person's physical state and well-being, including injuries, the symptoms of illness, and fatigue.
Class three allows the user to send simple concepts between minds, including those of non-sapient beings.  This is sometimes used to command pets.
Class four allows the transfer of words, though, by incorporating class three skills, the other person need not know the language.  Can also be used to learn another language by scanning concepts in their mind as they speak.
Class five allows memories to be transferred and altered.  Use with extreme caution.
[/hider]
[hider=Extra Sensory Perception:]
The ability to know information without a detectable transfer of information, such as telepathy, speech, sixth sense, or other senses.  Users are known as Espers.
Class one allows you to have a vague danger sense, allowing you to know if there is an increased danger in a situation, even if it is merely considered.
Class two allows more accurate reading of danger, including, at higher strengths, accurate or semi-accurate prediction of your enemies moves.  The main weakness lies in its restriction to attacks which put you at risk.
Class three allows you to predict danger to another person, place, or object by focusing on them.  This is generally less accurate than class two, unless you have a deep connection to the target.
Class four allows one to extend their abilities into the past, sensing areas of great impact to a person, place, or object.
Class five allows the user to extend their ability into the future, sensing things that will or may be of great impact to the target.  Increased strength leads to greater accuracy with predicted activities, and gives more information about future events.
[/hider]
[hider=Energy Manipulation:]
Gives the user the ability to manipulate energy in its various forms.  Users have an affinity for a certain type or range of energy, with the more specific types generally being more powerful when using energy of their type and weaker when using other forms, based on how similar it is to the one they have an affinity for.  Users are called Energetics.
Class one allows the user to produce a type of energy.  Limits, however, are difficult to state, as they depend on both the affinity of the user and the specific energy.  Limited to the user's body or nearby space, as the body must be the source.
Class two allows the absorption of a type of energy.
Class three allows the redirection and conversion of the element into other, similar forms.
Class four allows the remote use of energy, letting things other than the user's body act as a source.
Class five allows the user to utilize that energy to enhance their body, and are largely immune to the effects of it.  Examples include fire users feeding on heat to enhance their strength or endurance.
[/hider]
[hider=Cosmic power:]
Allows the manipulation of the physical world and its laws.  Little is known about this type of power, as users, known as Cosmics, are difficult to find and rarely allow themselves to be caught, as they are beyond other psionics.  Governs powers such as the manipulation of the sub-atomic, the manipulation of time and space, teleportation, and the like.
Not usable by most beings.
[/hider]

Besides organics lifeforms, many of which are humanoid, there are other types of lifeforms, including silicon based, those based on various types of metal, gaseous, and plasma based.  There are even energy based lifeforms, once known on earth as spirits, though they are rare, and are difficult to affect.

[hr]

We were sent to a planet in the Dilorees system, where the locals have only recently discovered gun powder.  A powerful consciousness was detected from the system via telepathy, and we were sent to investigate.  As such, we must blend in with the local populous as best we can, though they are highly genetically diverse, so most humanoid races can blend in well enough.  We must use technology that isn't more advanced than what exists on the planet, though, or risk revealing ourselves and contaminating their culture.

Characters should be limited to a max of 5 skill levels, and a maximum of ten strength levels, to keep them from being too OP.