Full Review for Newcomers:
One of the best games I played this year. Really, not joking (okay, maybe with the exception of Persona 5 Royal, but Didnapper 2 was still more fun). Classic JRPG retro style which plays like older Final Fantasy titles just with bondage mechanics. You don't just strike down enemies, you wear down their HPs and tie them up then. Same goes for your party members, a battle ends when one side is in bonds, but defeated characters can be freed by others. The combat system is really deep, there is status ailments, elemental attacks and weaknesses, buffing and debuffing, etc. Losing a battle doesn't always result in game over, often you'll be taken to a dungeon where you have to struggle out of various bondage styles in a mini game in order to escape. You can even a lose a battle on purpose (surrender-option) to be taken into the enemies hideout without having to look for it. The escape system is a also deep and requires strategy (interacting with guards, looking for items like shards, getting other prisoners to help you or just struggle). There are different body parts you can struggle with to free them (leg-bindings for walking around to look for items, gags to be able to communicate with others, blindfolds in order to inspect your situation). When you free your wrists, you escape. But you cannot always do that first because other bindings can make wrist-struggling nearly completely ineffective or even inaccessible. So it's much more then just a button-pressing minigame. At some points in the story you can interrogate other characters (even use light torture like slapping or tickeling). The interrogation system could be deeper and be used more often but it is still fun (although this part of the game felt like a big disappointment as I had much higher expectations here). The interrogations system is only used 3 or 4 times in the story (if I rember correctly) and that's it, therefore it feels a little pointless and not like a real game-feature. I hope it will be expended in the updates.
Storywise the game is also good, a low-fantasy setting with some twists and betrayals which I will not spoil here. It might not be the best fantasy story I have seen in a classic RPG (when compared to Xenogears or Chrono Trigger) but it's entertaining and a lot of work was put into the characters and it never got boring.
Do not mistake this game for some run-off-the-mill-hentai-fetish-nonsense, it's a real RPG with deep mechanics and just a lot of damsel in distress content. This (being a fetish) is the ONLY sex-related thing in the game, no one gets raped, severely tortured or even completely undressed. Really refreshing when compared to other games with fetish content. This one could still get a PG rating if you ask me. It's also not too short, you might be able to speedrun it in ten or so hours, my first playthrough took about 50 hours as I took my time levelling up and exploring everything.
Overall, a really great game. If you are into deep retro-style RPGs and bondage, it could be considered the holy grail and is an absolute must-play! It's DRM-free and there is also a Linux port. Please don't pirate it, support the developers to make more games like this and it's well worth the money they ask for. I even paid more because I found a $20 too cheap for such a great game. There is nothing which compares to this one (except for its predecessor which was also great, but Didnapper 2 has a much deeper escape and better combat system). Only thing I was really missing was the private cell system from Didnapper 1 (where you could interrogate teammates and other characters for fun and practice) and bad endings. In Didnapper 1 losing boss battles gave you several bad endings, in Didnapper 2 you'll just get a simple game over screen. Hey, just play both of them if you haven't already. It's really worth it.
Although not being perfect (interrogations part) I still rated it 5 out of 5 stars.