(In)complete list of Silver's powers so far
Chaos Energy Harnessing (Sonic the Hedgehog 2006)
Telekinesis (Sonic the Hedgehog 2006)
Telepathy [currently limited to inducing vertigo] (Sonic Rivals and Sonic Rivals 2)
Teleportation of both himself and others (Sonic the Hedgehog 2006, Sonic Rivals 1 and Sonic Generations)
Psychometry [seeing the experiences of objects] (Sonic the Hedgehog 2006)
[Arguably] Clairvoyance/limited future prediction (Team Sonic Racing)
Photokinesis (Sonic the Hedgehog 2006) [Bending light; this is how he creates barriers and shields, apparently]
Electrokinesis (Sonic the Hedgehog 2006,)
Induced Paralysis [could be counted under telekinesis] (Sonic the Hedgehog 2006)
Psionic Construct Formation [closest name I can find to his psychic knives shit] (Sonic Generations)
Psionic Augmentation [enhancing his own abilities and strength] (Source currently unknown but most likely to be Sonic the Hedgehog 2006 or Sonic Generations)
Psychic Field Projection (Technically assumed given how he can spread the effect of his powers over an area, but Galahad is also seen doing this in Sonic and the Black Knight, indicating that Silver can if he knows how. His psychic shockwaves could also apply to this)
Mediumship [being able to see and speak to ghosts] (Sonic the Hedgehog 2006)
Bioluminescence & Light Generation [technically a side effect of everything else but I'm counting it] (Sonic the Hedgehog 2006)
Anemokinesis (Sonic the Hedgehog 2006)
Pyrokinesis (Sonic Rumble) [questionable? I have no idea what the context is]
(I'm not counting time travel because he can't do it innately and doesn't without outside intervention most of the time anyway.)