Yes, NARRATIVE is a Scrabble word!

Letter values in Scrabble US: N 1, A 1, R 1, R 1, A 1, T 1, I 1, V 4, E 1.

Is it a valid word?

NARRATIVE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a message that tells the particulars of an act or occurrence or course of events; presented in writing or drama or cinema or as a radio or television program