- Estimated achievement difficulty: 2/10 [Achievement Difficulty Rating]
- Offline: 10 
- Online: 0
- Approximate amount of time to 1000: 2-3 hours [Estimated Time to 100%]
- Minimum number of playthroughs needed: 1
- Missable achievements: None [level select]
- Does difficulty affect achievements: No difficulty
- Unobtainable/glitched achievements: None
- Extra equipment needed: None
Welcome to In Between, a puzzle platformer where you take on the role of a man trying to cope with death. You'll go through the stages of this - Denial, Anger, Bargaining, Depression, and Acceptance - while you learn to cope with death. The core mechanic of the game involves changing the direction of gravity to navigate to a door of light at the end of each level, navigating through various perils. You will die a lot, but it isn't a very difficult game by any means, even without a guide. As far as achievements go, simply completing all levels is guaranteed to net you all but one achievement, but that achievement - for dying 100 times - is virtually unavoidable anyway.
There really isn't much in the way of controls or mechanics: use to move your character and use to change gravity, and that's really it. Go ahead and jump right into the tutorial where you'll learn how to navigate past various types of obstacles in the environment.
As you progress, each chapter has its own unique twist that you'll have to take into account in its levels. For example, in Denial, a black shadow will move towards you if you don't face it, and if it touches you it kills you, so you'll have to make sure to face it periodically to push it back. In Anger, there are red expanding and contracting circles that kill you if you touch them. In Bargaining the goal is to guide you and a mirror self through the level simultaneously until you collide. And in Depression the goal is to stay in the light because dark areas will kill you.
As you progress, you'll come across mind images where the background tears open to reveal a scene of a memory. These are the sort of collectible of the game, but as far as I can tell it isn't possible to miss any of these.
The "Fulfillment" achievement solution has video guides of all levels, so if you get stuck or just want to use walkthroughs, refer to that achievement solution for more information.
Upon beating the game, watch the credits, and that should wrap up your completion. If you somehow didn't die 100 times along the way, go back to pretty much any level and kill yourself over and over until the achievement unlocks.
In Between is a very deep and atmospheric puzzle platformer with a story that will keep you invested even while solving puzzles. The puzzles themselves are unique and interesting, especially with the new mechanics added in each chapter. The controls are also tight and the hit boxes are more than fair, meaning there shouldn't be much cause for frustration (aside from your own fault). The result is a very solid and enjoyable puzzle platformer, but also a relatively fast and easy completion. So whether you're a fan of the genre or just out for some easy gamerscore, In Between is a great choice.
[XBA would like to thank Necrophage33 for this Roadmap]