So, 2e Psionics had a couple different versions, the Complete Psionic/Will and the Way version, and the Skills and Powers/Way of the Psionicist version. This system is somewhat of a compromise between the two, heavily favoring Complete Psionic/Will and the Way, but making psionic combat, especially a combination of the two. Attacks against other psychics deplete PSPs, but contact doesn't require them to be without PSPs... just sufficiently overmatched (or unlucky) to be hit several times without getting any hits in return. This required a rewrite of attacks and defenses. I also rewrote Telekinesis, because the Complete Psionics version really sucked... it was not worthy of being called a science.