The TurboGrafx-CD (PC Engine CD) version of Altered Beast is a largely faithful port of the arcade original, adding "story mode" cutscenes, Japanese narration, and slightly altered colors.
The Sega Master System port of Altered Beast. It has heavily modified visuals due to technology capabilities. Unlike those versions the SMS port only includes single player mode and had only four levels.
It's a 2D action game focused on hack & slash with occasional platforming sections. Castle of Dragon contains eight stages and after the first three stages the game allows the player to choose from five levels at will while all the five stages must be completed to beat the game.
Downtown Nekketsu Story is the original version of the game known as River City Ransom.
The game was first released as Downtown Nekketsu Monogatari, but has since been localized as Downtown Nekketsu Story.
Double Dragon for the MSX seems to be ported from the NES version. The controls seems sluggish here. The game was released only in Japan and Korea and it's another unlicensed game.
Sakigake takes place at a school called Otokojuku, which is a private boy school that teaches Oendan to student delinquents. Oendan is basically a cheering squad that is somewhat similar to cheerleaders, except they focus mostly on noise and atmosphere than being acrobatic. The school is run by the principal Heihachi Edajima, who uses martial arts to train his students to be better people for society.