After three years, he returned to İstanbul and began studying at Hasköy Lisesi.
Kuşkan made his film debut in Sis which was written by Zülfü Livaneli and played the role of a photographer in the TRT series Gençler.
Next, he starred in Ömer Kavur's Gizli Yüz which he followed with roles in C Blok, Çakalların İçinde, Yaz Yağmuru, Sahte Dünyalar, Özlem Düne Bugüne Yarına, Aşk Üzerine Söylenmemiş Herşey, Deniz Bekliyordu, Kurtuluş, Avcı and Dokuz.
Kuşkan then successfully starred in a series of Çağan Irmak's productions Yolculuk, Mustafa Hakkında Herşey, Babam ve Oğlum and Kabuslar Evi.
He was given the Best actor award at the 25th Istanbul Film Festival for his performance in Babam ve Oğlum.