Here's the PSP Genesis Collection games list:
#01 Alex Kidd in the Enchanted Castle 1989
#02 Altered Beast 1989
#03 Bonanza Bros. 1990
#04 Columns 1990
#05 Comix Zone 1995
#06 Decap Attack 1991
#07 Ecco the Dolphin 1993
#08 Ecco: The Tides of Time 1994
#09 Ecco Jr. 1995
#10 Flicky 1991
#11 Gain Ground 1991
#12 Golden Axe 1989
#13 Golden Axe II 1991
#14 Golden Axe III 1993
#15 Kid Chameleon 1992
#16 Phantasy Star II 1989
#17 Phantasy Star III: Generations of Doom 1991
#18 Phantasy Star IV: The End of the Millennium 1994
#19 Ristar 1995
#20 Shadow Dancer: The Secret of Shinobi 1990 unavailable in the PAL release
#21 Shinobi III: Return of the Ninja Master 1993
#22 Sonic the Hedgehog 1991
#23 Sonic the Hedgehog 2 1992
#24 Super Thunder Blade 1988
#25 Sword of Vermilion 1990
#26 Vectorman 1995
#27 Vectorman 2 1996
#28 Virtua Fighter 2 1996
#29 Astro Blaster 1981
#30 Congo Bongo (AKA Tip Top) 1983
#31 Eliminator 1981
#32 Space Fury 1981
#33 Super Zaxxon 1982
https://en.wikipedia.org/wiki/Sega_Genesis_Collection
No trophies and about 15 fewer games than the PS3 version, but the games should be much more playable on the small Vita screen.

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