Complex sentence: By 1996, he was co-starring alongside some other well known Hollywood actors in his role as "Ramόn Sánchez", a.k.a. the "Phantom Phreak" in "Hackers".
Split into simpler sentences: By 1996, he was co-starring alongside some other, well known Hollywood actors. That year, he played Ramόn Sánchez, a.k.a. the "Phantom Phreak" in "Hackers".