Mountain Crime: Requital contains neither Steam nor in-game achievements at the time of writing, it also has no collectables to locate.

My video walkthrough below has time markers for all hidden object scenes and mini-game puzzles with full solutions (none skipped) you should be aware that the actual solutions to many (but not all) mini-game puzzles are random, as such my video may not always show you the answer but it may help you work it out. (I'm guessing that there are a finite number of random solutions, so who knows you may get lucky).

Video contains...
@ 2:28 = HOG #1 (Hotel Entrance).
@ 3:52 = HOG #2 (Reception Desk).
@ 5:34 = Puzzle #1 (Dominoes puzzle, Right Wing).
@ 9:46 = Puzzle #2 (Torn up picture puzzle, Room 201).
@ 11:50 = HOG #3 (Room 203).
@ 13:21 = HOG #4 (Room 205).

Video contains...
@ 5:49 = HOG #5 (Reception Desk, 2nd time).
@ 8:34 = Working out the antidote.
@ 12:32 = HOG #6 (Room 205, 2nd time).

Video contains...
@ 3:36 = Puzzle #3 (Suitcase lock puzzle, Room 201).
@ 7:02 = Puzzle #4 (Laptop login puzzle, Room 201).
@ 8:39 = Torch handle puzzle solution.
@ 9:31 = Puzzle #5 (Torch handle puzzle, Room 204).
@ 10:00 = HOG #7 (Room 203, 2nd time).
@ 13:09 = HOG #8 (Room 205, 3rd time).

Video contains...
@ 1:54 = Puzzle #6 (Disarm the bomb puzzle, Room 206).
@ 8:03 = Puzzle #7 (Door lock puzzle, Elevator Lobby).
@ 8:59 = HOG #9 (Blacksmiths).
@ 10:17 = HOG #10 (Outside Stables).
@ 13:44 = HOG #11 (Blacksmiths, 2nd time).

Video contains...
@ 0:56 = Stable door lock puzzle solution.
@ 1:33 = Puzzle #8 (Door lock puzzle, outside the Stable).
@ 6:18 = Puzzle #9 (Wolf head puzzle, inside the Stable).
@ 8:03 = HOG #12 (Piano Room).
@ 12:21 = Puzzle #10 (Ship bottle puzzle, Room 311).
@ 13:39 = HOG #13 (Piano Room, 2nd time).

Video contains...
@ 3:17 = HOG #14 (Room 312).
@ 7:16 = Puzzle #11 (Chimney sweep puzzle, Room 300).
@ 10:15 = HOG #15 (Piano Room, 3rd time).
@ 11:13 = Animal figurine sequence puzzle solution.
@ 11:59 = Chess puzzle solution.
@ 12:19 = HOG #16 (Room 300).
@ 13:07 = Puzzle #12 (Animal figurine sequence puzzle, Room 300).

Video contains...
@ 0:01 = Puzzle #13 (Chess puzzle, Piano Room).
@ 2:18 = HOG #17 (Reception Desk, 3rd time).
@ 3:08 = Puzzle #14 (Door lock puzzle, to the left of Reception).
@ 5:31 = HOG #18 (Kitchen).
@ 6:21 = Puzzle #15 (Sliding block door lock puzzle, Kitchen).
@ 7:42 = Puzzle #16 (Fuse puzzle, Wine Cellar).
@ 10:43 = Puzzle #17 (Symbol combination door lock puzzle, Laundry Room).

Video contains...
@ 0:00 = HOG #19 (Kitchen, 2nd time).
@ 1:47 = Puzzle #18 (Pipe flow puzzle, Bar).
@ 4:50 = Drawer secret compartment combination puzzle solution.
@ 5:44 = HOG #20 (Hotel Entrance, 2nd time).
@ 7:10 = Puzzle #19 (Drawer secret compartment combination puzzle, Telescope Room).
@ 9:11 = HOG #21 (Outside Stables, 2nd time).
@ 12:43 = HOG #22 (Blacksmiths, 3rd time).

Video contains...
@ 1:06 = HOG #23 (Mountain Top).
@ 2:30 = Puzzle #20 (Window lock puzzle, Mountain Top).
@ 6:25 = HOG #24 (Mountain Top, 2nd time).

For anyone with problems viewing the embedded videos in this guide (such as those in China having to use a VPN to watch videos on YouTube) here's a link to the playlist...
https://www.youtube.com/playlist?list=PLgrKGjfHCc0g7_sDTgoAu8HeJr_TAN-JR

I hope you found this guide of help, all comments, suggestions and criticism (constructive) is gratefully received.

An A to Z list of my Steam achievement guides and walkthroughs can be found @
https://sp.zhabite.com/sharedfiles/filedetails/?id=1502405720
If you would like to get a notification in your activity feed when I post a new guide, just click the "follow anrkyuk" button on my profile guide list...
https://sp.zhabite.com/id/anrkyuk/myworkshopfiles/?section=guides