Altered Beast - Title Screen

You get little hints at it with the between-level scenes found only in the arcade version, but the ending is all of the werebeasts and monsters taking off their costumes and revealing the human actors beneath.

Dragon Ninja

Bad Dudes vs. Dragon Ninja - Title Screen

Data East did do a good job of including plenty of references to their own properties into Bad Dudes though, in a way that wasn’t really done up until this point, creating their own sort of Data East culture.

Double Dragon

Double Dragon Arcade - Title Screen

Thankfully, Double Dragon does have an attack that’s practically guaranteed to get you through without too much trouble, as long as you get the timing down: The elbow smash.

Nekketsu Kouha Kunio kun

Nekketsu Kouha Kunio kun Arcade - Title Screen

It’s unclear how much inspiration was actually taken from other media, but in a 2013 interview director Yoshihisa Kishimoto said that the game reflected his own high school experience.