There should be an instruction book that says how the upgrade system works like the red book in the beginning that tells you how medicine and adrenaline works because i just assumed that you could of obtained all of them at once.
Nice nice, how did you enjoy it? I haven't been active much here cause I've been chugging away at the game. I'm literally at the final stage of development, doing the endgame cutscenes and finally starting development of the final boss as we speak :)