That's weird, for mine, I finished the game with older version first or rather before the latest version (above) got uploaded. When I opened the new version, I got the gallery viewer.
I'm okay to share my save file but I'm not sure what they look like or where they're at actually. I also tried to get raped/defeated a lot of times just to see if there's any variations since the torture scene are random every time. I launched the older version, the one with huge maps that has "getting over it" vibe version, apparently I also has that gallery button in the main menu there
By beating the game, I mean by confronting the main suspects/contacts. To get to them, you have to buy 5 information from the informants, if they're too expensive, just keep doing quests. some will give you information, some will reduce the price of the information from informants. Once you got all 5, try getting to the mc wall map (or something) and find the suspect/contacts, and confront them through there