Mary Skelter 2 is a very enjoyable Dungeon Crawler with a lot of story points. It has a mature theme. There are no missable achievements as long as you use different save slots. Unlocking them all takes around 65h.
Approximate amount of time to 100%: around 65h
Estimated achievement difficulty: 4/10
Minimum number of playthroughs needed: 1
Is there a good guide available: Yes, there is this amazing walkthrough and I wrote this achievement guide
Multiplayer achievements: No
Missable achievements: No, as long as you use a few different save slots
Grinding Achievements: No
DLC-Only achievements: No
Speedrun achievements: No
Time-gated achievements: No
Does difficulty affect achievements: No, you can play on the easiest difficulty
Unobtainable/glitched achievements: No
Mary Skelter 2 is an amazing game and it also included Mary Skelter: Nightmares which unlocks after beating the main game. This is done that way because you kinda should play them in that order: First MS2, then MS:N and after that Mary Skelter Finale, which hopefully will get a Steam release.
Mary Skelter 2 is a Dungeon Crawler with a lot of story moments. You can skip those story moments if you don’t want to go through a lot of endless talks, but I would recommend at least going through the one that happen in the dungeon and when you return to your base to keep up with the story. Personally, I skipped the ones around the rooms of the girls and in the base after a while as they can keep going for a while.
The main gameplay is going through the dungeons. They will have multiple floors, but you’ll unlock shortcuts to new floors after you have reached them and found those. The game can be a bit challenging as you try to keep the mood of everybody stable… they might be more powerful when they go crazy, but also have a higher chance to die, so most of the time it isn’t worth the risk. There is an auto move feature if you want to go back to a certain point in the dungeon when you already have been. With the standard settings, it will stop working when coming close to a threat, but you can change this in the settings. The game also has an auto-battle function, which you can activate and stop while being in a battle. I have used this a lot when encountering easier monsters, but you will want to fight manually when encountering a boss fight. I love that Mary Skelter 2 has those 2 quality of life features.
Before the release and in the first week after the release on steam, there was some controversy around the “purge” mechanic being removed from this version. This is a feature with some mature content. I didn’t mind that it was removed as I skipped through it in MS:N as soon as I could. By now there has been a patch where it has been added to the game, but it is optional, which is the best of both worlds, this way the people who want it can turn it on and those who don’t like it can have it turned off.
I have encountered a few bugs while playing through the game. At one point the story just stopped after a boss battle and I had to reload my save and beat the boss again for it to continue. That wasn’t too bad as I always just save before story points in the dungeon (as you can see them before encountering them). What was worse is that I have had a few crashes, which made me lose progress. This seems to have to be something to do with playing MS2 on an ultrawide monitor, but it is kinda annoying. I would suggest saving a lot and on different save slots, this will also help out with the achievements and when you screw up during a boss fight.
Speaking about the achievements, it has the kinds you expect in an RPG/Dungeon Crawler. There are a lot story related, using a skill X amount of times, completing side quests, and more stuff like that. The game has 2 different endings, but after you complete one you can go back to your previous save and get the other one. As long as you save often and before each story point, you will have no problem at all.
This review was written on 28 January 2022, based on the current Steam version of the game which has 33 achievements at the time of writing this review. This information can be outdated, for example, when the developer adds or removes achievements or releases (new) DLC.