Oh you could say that about anything, though, particularly in the era when games rarely tried to be realistic.
"A plumber stomping on mushroom-creatures and throwing fireballs on a quest to save a princess from a turtle-creature? Outlandish!"
"Anthropomorphic animals dogfighting in space? Ridiculous!"
"A guy taking on a castle full of terrible monsters with little more than a whip? Impossible!"
"A pink ball-like creature that sucks his enemies into his mouth and then swallows them to gain their abilities? Ludicrous!"