On the beat 'em up side, I recognised Undercover Cops and Final Fight from previous events. And for puzzle games, I spotted Puzzle Bobble and Mr Driller G.
Oh boy, Mr Driller G. At HEY, I wanted to try out the games I've gotten decent at on MAME, so I've gotta play this. Thankfully, they had the sense to add an autofire button to it, because the game plays so much better with it (the Drill Land port doesn't have it, unfortunately).
After a few credits, I made it past 1500m with the robot, but wow, the leaderboard is nuts. It seems like Mr Driller G preserves high score data across reboot, and there were people who got past 10000m.