No love for Black Tiger? Multi-directional platforming, hidden treasures, collecting money to buy weapons upgrades, armor and power-ups, boss fights and an actual ending with credits...all in an '80s coin-op game? WOW. And searching for it online many years later was what first led me to MAME.
Honorable mentions for:
Bank Panic
Roc n Rope
City Connection
Speed Rumbler
Boogie Wings