I think it was Resistance: Burning Skies, unfortunately. I have 8 Vita Platinums total and that was easily the worst of them (the other games being Uncharted, Gravity Rush, Sound Shapes, Persona 4 Golden, Playstation All-Stars Battle Royale, Plants vs. Zombies, and Guacamelee)
Oh man ... you did Gravity Rush? I couldn't bear to go through all of the challenges.
My first was Unit 13...since then I've gotten Shinobido, Resistance, PVZ, Atelier Totori and LBPV.
My first was Gravity Rush, then I went out and got Resistance and 100%ed it in 5 hours lol. I've also completed Virtue's Last Reward, but you get a plat just for beating that game lol --- 3DS - [1203-9218-7780] | XBL - [NettoSaito] | PSN - [NettoSaito] | NN - [NettoSaito] Netto's Game Room [News, and Reviews!] - http://www.nettosgameroom.com/
Incidentally, it's my only Plat between Vita games. I usually don't care about trophies, it's just that with DJ Max you get the hardest ones just by playing a lot. --- "It's a tradition unique to JRPG fanbases to discuss the virginity of characters." - SetsunaFSeiiei BBCP HYYYYYPE