S+
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Dezaemon
Gradius III w/ SA-1 hack
Macross: Scrambled Valkyrie
Gokujō Parodius
R-Type III
Super Aleste (didn't get into regional changes)
Star Fox (overclocked) [Mark MSX guest review]
UN Squadron
Wild Guns [Mark MSX guest review]
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Flying Hero ("Like an SNES Star Parodier")
Gradius III
Pop n' Twin Bee ("Some of the best pixel art on the system")
Star Fox [Mark MSX guest review]
Super R-Type w/ SA-1 hack
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Biometal
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Choplifter III
Cotton 100% (Says it's "the prettiest Cotton of the era")
Darius Twin
Darius Force
Imperium
Rendering Ranger
Super R-Type
Syvalion
Thunder Spirits
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Hyper Zone
Spriggan Powered
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Strike Gunner S.T.G. ('Not all bad, has great challenge + SFX')
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Super Drop Zone
The Hunt for Red October
Raiden Trad
SD Gundam 2
Yam-Yam!? (Can't read the text, averaged the rest out to here)
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Galaxy Wars
Space Invaders
Tekkaman Blade
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SD Gundam V
Might've been a little generous with the S ranks, and Super R-Type doesn't belong in the same rank with Imperium. But overall pretty reasonable imo. Parodius is great, but personally I might lean toward having R-Type III as the top game, especially because it's unique to the library. People tend to go elsewhere for their Parodius.