Estimated achievement difficulty: 1/10 [Achievement Difficulty Rating]
Offline: 24 (1000)
Approximate amount of time to 1000: 8-10 Hours [Estimated Time to 100%]
Minimum number of playthroughs needed: 1 (Multiple playthroughs may require if you missed a collectible or forgot to do something)
Missable achievements: 8 ("I See You," "Snail's Pace," "Wrong Number," "Radio Starchie," "Stretch Goals," "Combo Time," "New to Ooo," "Flimpin' The Diode")
Does difficulty affect achievements?: No
Unobtainable/glitched achievements: None
Cheat codes disable achievements?: No cheat codes available
Extra equipment needed?: None
This fully 3D Adventure Time game gives you the chance to completely explore the land of Ooo with Finn and Jake. After discovering a ticker-tape machine that prints out mysteries, Finn and Jake go into the investigation business. In a series of connected adventures, they explore iconic AT locations like the Candy Kingdom and Wizard City to solve the mysterious cases. Along the way, they'll interact with all of the best-loved characters from the show. This is the first Adventure Time game that features the entire voice case from the cartoon. The focus is on exploration and puzzle-solving, but there are plenty of chances for Finn to bust out his sword and go nuts too. Between cases, you can even kick back in the treehouse, hang out with BMO, and pile up tons of treasure.
Adventure Time: Finn and Jake Investigations has an autosave feature. Meaning there is not chapter select or any save slots. So if any collectables are missed or forget to complete something. You will be forced to start a new game.
Now the main focus here is to complete all 5 cases, Sweet Sweet Magic, Lumpy Ice Princess, Sour Notes, Everything Must Go, and Album (Re)cover. As you complete these cases you will unlock majority of the achievements as they are story related. Also advise to listen to The Grayable's tutorial as he will teach you how to interact with certain objects and how to combine objects with one another. It's recommended to follow the step by step walkthrough above to help you solve these cases, find collectibles and help complete the game without missing any achievements.
There are also a total of 8 missable achievements, "I See You", "Snail's Pace", "Wrong Number", "Radio Starchie", "Stretch Goals", "Combo Time", "New to Ooo", "Flimpin' The Diode", so following a walkthrough will definitely help you not miss any of these and avoiding a second playthrough.
A complete step by step walkthrough can be found HERE by PT user themindisacity.
Adventure Time: Finn and Jake Investigation is a very easy 1000 that can be completed in an afternoon following a step by step walkthrough. If you are a fan of the Adventure Time show then this is must play for you.
[XBA would like to thank Viktor Vaughn for this Roadmap]