Yume Nikki Wander a girl's dreams

You start in a small apartment. There is very little to do in it, and the one meaningful action is going to bed. Sleep drops you into a hub of doors, and each door opens onto a dream with its own logic: a snowfield, a forest, a world of looping corridors. Nothing tells you where to go or what anything is for. You walk, you notice things, you take a door you did not plan to take. The maze-like design is deliberate, and getting lost is not a failure state, it is the game. If you want objectives and directions, this will test your patience. If you can slow down and let yourself be lost, few games are as absorbing.

The only collectibles are Effects, hidden on certain characters and items across the dream worlds. Using one changes the main character's appearance, and some have a special action you can trigger with a keypress. A second press turns her back to normal. They read less like powers and more like small oddities: a way to move faster, a way to look different, nothing that fights back. Effects can only be discarded in rooms with many doors, a rule the game never explains, like most of its rules. Finding them without help takes luck or long, careful wandering, and that hunt is part of what the game is about. There is also a secret ending, if you make it that far.