This game pioneered rotoscope animation and directly influenced the Tomb raider series in many ways:
Crumbling slabs that you fall through
spikes that kill you if you fall on them, but you can walk through them
Clanging jaws that will chop you in half
the re-cycling of multi-tier map design, when one big room with many levels becomes a central atrium to which you return many times, just sometimes higher or lower than you were before. Also a very clever use of limited memory resources.
A random doppleganger encounter that hurts you when you hurt it.
block-based jump physics with standing, running, and vertical jumping
hanging from ledges as a mechanic
little known fact about prince of Persia but if you holster your sword and hold X and T while drawing your sword, the player draws a pair of uzis instead
Expecto parabellum!