- Estimated achievement difficulty: 6/10
- Online: 0
- Offline: 50 
- Approximate time to 1000: 30-35 hours
- Minimum number of playthroughs needed: 2 (3 recommended).
- Missable achievements: Yes ("No Stone Unturned," "Safe and Sound," "Powerhouse").
- Does difficulty affect achievements: No
- Unobtainable/Glitched achievements: No
- Glitchy Achievements: Yes (See Roadmap).
- Extra equipment needed?: No
Ori and the Blind Forest is a metroidvania platformer with very light RPG elements. If you played Shadow Complex or Dust: An Elysian Tail on Xbox 360, it is very similar to those. There is a large map with multiple locations, and as you acquire new abilities, returning to earlier locations will open new areas to explore and things to collect. It has an incredibly beautiful art style and soundtrack to go with very solid platforming gameplay. A wonderful game and early GOTY contender.
There have been reports of some glitchy achievements, though this is par for the course on Xbox One by now. Most of the concern has been for the first secret and first map stone achievements, as well as finding all the secret areas. Luckily, there is an easy way to fix/glitch it. See "No stone unturned" for more info on that. There is also an issue with the "Elite" achievement not unlocking properly, more on that in the warning before Step 2.
Step 1 - 100% Run:
The first playthrough will be your main run. Don't worry about deaths or time, instead taking in the game and working on uncovering the entire map, collecting everything, maxing out all your abilities, and doing the miscellaneous combat-related achievements.
There are four locations that can not be returned to, and therefor contain missable collectibles. These are the Ginso Tree, Misty Woods, Forlorn Ruins, and Mount Horu (the point of no return). Take it slow in these locations and make sure you collect everything as soon as possible so you do not miss out. I would also suggest copying your save file to a new slot before these locations in case a mistake is made. If you want to follow a complete video walktrhough for all the collectibles, this one has everything together. This image of the map has all the different types of collectibles marked as well. Otherwise, I have individual videos for each specific collectible type attached to their specific achievements.
You should also use the save copy feature just before the point of no return I mentioned before if you need to continue working on collectibles, as each save file is locked upon completion.
WARNING: Before moving to Step 2, make sure you delete ALL save files and only have one active playthrough going. You can also delete your save from the game hub, which will delete it from the cloud as well. The achievement for purchasing no abilities appears to be glitchy, in that it seems to search all your save files, and if you have any save file where you have purchased an ability, the achievement will not unlock for the save file where you didn't. Having only one active playthrough will avoid this.
Step 2 - No Abilities:
Doing this by itself is helpful because you will want the extra help staying alive and saving more during your no death speed run that the abilities in the Efficiency tree provides, as well as extra combat skills to quickly take out enemies you can not avoid. For this run, all you need to do is avoid buying any extra abilities and complete the game. You can attempt to combine this with Step 3, but it is no easy task.
Step 3 - Speed Run + No Deaths:
You will need to abuse the save system during this playthrough. If you exit the game before respawning, generally the death will not be recorded. However, make sure you create copies of your save often, this way if you're not fast enough and a death is recorded you will not lose much progress. I would suggest taking the game one objective at a time, and trying to keep each section to 15-20 minutes. Most people will be able to do this in around two hours, so that is plenty of extra time to play with if you need to take a certain section (such as the Forlorn Ruins for myself) a little more slowly.
Step 4 - Mop Up:
You shouldn't have any achievements left at this point, but if for some reason you need more kills or never did a specific combat-related achievement, refer to those now to finish up your 1000.
Huge thanks to the follow for their help with this guide:
- Ravenous IE
[XBA would like to thank The Pants Party for this Roadmap]