Ninja Clown (1991), nice control and graphics.

Pink Sweets: Ibara Sorekara (2006) gameplay

Three Wonders: Quest for the Chariot (1991) gameplay

Gaiapolis (1993), a nice RPG game in arcade by Konami.

Three Wonders: Midnight Wanderers (1991) gameplay

西游释厄传 / Oriental Legend (1997) gameplay

Muchi Muchi Pork!/むちむちポーク! (2007) game longplay

Tough Turf (1989), its plot is hard to understand..

Skull & Crossbones (1989), has a short flow for casual play

Mad Motor (1989 Arcade), earlier than Road Rush

Takeda Shingen / 武田信玄／たけだ しんげん (1988) gameplay

Double Dragon II: The Revenge (ダブルドラゴンII ザ・リベンジ/双截龙2:复仇）Arcade version longplay

Sengoku Denshou 2 (戦国伝承2,1993), quite a bit better than generation one, but not good enough

Sengoku / Sengoku Denshou (1991) game longplay

虫姬2/虫姬さまふたり/Mushihimesama Futari gameplay

Death Smile, a rare horizontal STG game, it's nice to play

Knuckle Bash, a special beat-em-up game, you can play it

Robo Cop 2 (1991) gameplay

Riot City (1991) gameplay

Robo Army (1991) gameplay

Pu·Li·Ru·La (プリルラ) (1991) gameplay

Lighting Sword (1991) gameplay

Burning Fight (1991) gameplay

Arabian FIGHT (1992) gameplay

The Cliffhanger: Edward Randy (1990) gameplay

Growl (1990) gameplay