As the Genesis did its best to beat the SNES to the market (a mistake Sega kept doing until their last console), few games are still in 1989, including this one, which is probably the best of that year.

That said, I would add:

• Altered Beast*
• Thunder Force II
• Ghouls 'n Ghosts*
• Super Hang-On*
• Golden Axe*

*These are all arcade ports, and while the Genesis ports are pretty good, the Arcade versions are recommended.