Yes, CRUSADED is a Scrabble word!

Letter values in Scrabble US: C 3, R 1, U 1, S 1, A 1, D 2, E 1, D 2.

Is it a valid word?

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

exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for
go on a crusade; fight a holy war