This is only the debug version. This game isn't complete yet. There is no way to win yet.
Yandere Simulator is an upcoming stealth video game for the PC that is being developed by YandereDev, who has made early debug versions of the game available via its official website
School Atmosphere Update
SEPTEMBER 1, 2015
EDIT: Bugs were found and fixed. A new build is now available.
School Atmosphere has finally been added to the game! This new feature affects almost everything about the game. Here’s a video that explains all of its current effects:
Here’s a full list of everything that’s new in this build:
Customization
Added a “Choose Uniform” interface to the “Customize Senpai” screen. The player can now choose what uniform the school’s students will wear.
There are now 5 uniforms available for male students.
There are now 5 uniforms available for female students.
It is possible to apply custom textures to all 5 of Yandere-chan’s possible school uniforms.
The process for applying custom textures to Yandere-chan has changed slightly. There will no longer be a “CustomArms.png” and Yandere-chan’s arm texture will now come from “CustomUniform.png”. I apologize for any custom textures that break because of this!
It was only possible to add new uniforms to the game because of a tremendous amount of assistance from Saracen!
School Atmosphere
If a student stops coming to school (because they were killed or kidnapped), School Atmosphere will drop slightly.
If a corpse is discovered, School Atmosphere will drop significantly.
As School Atmosphere drops, the school becomes darker and less colorful.
As School Atmosphere drops, the game’s background music changes to suit the mood of the school. These new music tracks were composed by Henry Rofkar of Only Wednesday Music!
As School Atmosphere drops, students will become more paranoid.
A paranoid student can notice dangerous behavior from a farther distance.
A paranoid student becomes alarmed faster than a normal student.
A paranoid student’s idle animation is similar to the movement of a security camera (looking left and right) increasing the chance that Yandere-chan will be spotted by them.
As School Atmosphere Drops, Yandere-chan will lose more reputation points from dangerous behavior (carrying weapons, looking bloody, acting psychotic).
Now, when a student is murdered, they will scream. If a student hears a scream, they will react by turning in the direction of the scream.
As School Atmosphere drops, students will react to screams from longer distances.
The “mood” of the Calendar Screen changes to reflect the current level of School Atmosphere, and displays a number and a graphic that relates to the current School Atmosphere level.
Miscellaneous Additions
If Yandere-chan steps into a puddle of blood while barefoot, she leaves behind a bloody footprint instead of a bloody shoeprint.
Students will now react to Yandere-chan when she is laughing in a sadistic and psychotic way. This will cause reputation loss.
Added more options to the Debug Menu (accessed by pressing the “” key on your keyboard).
Added a “stab” sound effect when stabbing students.
Added a new sponsor to the sponsor screens.
Bug Fixes
Fixed bug that would allow Yandere-chan to clip into the bathtub in the shower room by running towards the purple haired girl while she was bathing (I think).
Fixed bug that would cause objects to grow larger and larger in size every time they were picked up and dropped by Slender-chan or DK-chan.
Fixed bug that would cause Yandere-chan’s textures to get screwed up if Easter Eggs were activated while she was nude.
Fixed bug that was preventing outlines from appearing on male students’ heads in Yandere Vision.
I’m going to take a two-week vacation from game development now, but I have some noteworthy blog posts planned for the near future, including a contest that I’m very excited about! Please keep checking in for updates!

Yandere Simulator (debug) September1st_Version 2 update