why i cant unlock all picture in gallery?
If you're not just getting a save file with them already unlocked: They're randomly chosen from a pair every time you lose under specific conditions.
- The first two are from running out of HP outside of boss battles.
- The next two are from running out of HP while fighting the human slaver boss.
- The two after that are from running out of HP while fighting the pig orc boss with the butcher's/welding apron and hook-on-a-chain weapon.
- Next two are for losing against the succubus boss.
- And the last two are for losing against the final boss, Asmodeus.
It's unfortunately completely down to luck which of the two animations you get when you lose. So just keep a save right before a boss and check the gallery to see which you unlocked. The differences between the animations are negligible most of the time (i.e.- there's more or less bondage, the legs are in a slightly different position, there's less tentacles, etc.), which makes it tougher to realize if you've gotten them without checking the gallery.
You can cancel out the game overs and go back to the menu using the Escape key if you want to try to speed things up a bit. Unfortunately you have to wait for the scene to fade in from black fully before it'll let you skip, though.
If you're talking about the enemy animations instead, those tend to also be randomly chosen from pairs or trios but at least you can run into enemies yourself to speed up when you get stunned.
If you're trying to get the animations for regular enemies I recommend doing it near a save point: Run into the enemy you're still missing an animation from three times quickly to get stunned and grabbed, and then run back to the save and press F to get a free heal without using the V key and consuming demonic energy. Rinse and repeat until you've seen the 2-3 animations you need.
If you're trying to get them from bosses, it's a little harder for some of them:
- The pig orc with the apron tends to stun you only with his running charge, but since he runs through you you'll usually recover on your own before he can walk back and start an animation, so you need to try and stun yourself without him starting his charge thing.
- The succubus lacks a hitbox when she's floating to a different spot, meaning you can't stun yourself on her then. Her laser attacks also seem to not be able to stun you even though they can hit you repeatedly very quickly. She doesn't change spots if you haven't hurt her too much, though. Also, one of her attacks reverses your left and right controls, which can make stunning yourself on purpose hard if you didn't notice you got hit by it (it's the large curving-trajectory heart attack).
- The final boss actually only has one animation- the second animation slot is shared with the tentacles you can find a little bit before you reach it (probably because the boss can spawn them with one of its attacks). Just walk into the tentacles and let them grab you to get that second animation. Do note that the final boss actually has two floors you fight on: Enter the door whenever it flies up and you don't see a shadow appear on the floor, unless you want to patiently wait for it to decide to come back down on its own.