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DERE EVIL EXE is both a terrifying thriller with a gripping story and an unorthodox retro platformer with unique puzzles and obstacles.

In DERE EVIL EXE, you step into the tiny shoes of a silent hero named 'Knightly'. Knightly must jump, run, and manipulate environments in order to survive the heart-racing journey through a stunning pixel art world.

Within surreal structures and blocky hills lurk dangerous creatures known as 'corruptions'. They take the form of their creator's greatest fears. Their creepy creator, sporting a cunning visage of cheerfulness, hides in plain sight as she watches her prey fall deeper into her traps.


Modern 2d side-scrolling horror game with levels inspired by the simplicity and aesthetics of 16-bit arcade classics of the 80s and 90s.

The game plays either catchy retro chiptune music or ominous PSX era orchestral music, depending on the situation.

A completely new meta story that bends the creepypasta genre in ways unseen in the video game world.

You don't need to have played the award-winning Dere .Exe, Sorority Rites, and The Last Yandere to enjoy DERE EVIL EXE.


The AppSir Games Universe

Welcome to the AppSir Games Universe, a series of standalone games with intertwined stories. AppSir has been building its interconnected universe through video game releases like DERE EVIL EXE, HopBound, and Puzzling Peaks EXE since 2017.

Journey into the depths of horror at https://www.AppSirGames.com.


Get this game and 1 more for $2.00 USD
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In order to download this game you must purchase it at or above the minimum price of $0.67 USD. You will get access to the following files:


Development log


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Oh yes I remember playing this on my phone, this game is awesome! i actually replayed it several times!

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Creepypasta style platformer. I really like the art style, challenges, controls, overarching mood and story and how it manages to throw you off guard occasionally. Its also playing with the concept of the ingame tutorial not being "written", but voiced by an AI which makes for a different type of engagement and connection that you get to the game and its world. It still feels a bit too close to other games in the genre, but its not terrible long, so I'd absolutely recommend checking it out if you enjoy small platforming games. If you want to get more out of the story, you might want to look into playing the devs previous games. 3,5/5

More Racial Justice Bundle impressions:

El juego está roto, me aparecen cosas extrañas. Ayuda. Rezo cada noche desde que lo jugué.


I play it on the phone, it's really entertaining and trippy.
I like the idea that the AI wants to destroy you. Very good

Hi. I just see on buildbox engine website and they proudly your game make by that engine. Is that true. If true, tell me how do you make this game (story game req a progamming skills). Thanks

yes it is made with Buildbox. just try it out for yourself and follow some tutorials. you'll be making awesome games youself if you work for it :)

The game dont opens, help

What error message is showing? What PC are you using?

No error message I mean the game opens and closes instantly im whit windows 10 if you are asking that (sorry for the bad english)

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huh. i've never seen that happen before. does this happen to other games made by us too? like DERE EXE: The AppSir Prequel?

the same thing happens D:

oh no! would you like a refund

Wish there was some way to change the controls, I play on a 60% keyboard meaning I do not have arrows keys, and have to let go of my Fn key to hit space, therefore I cannot move and press the space bar at the same time. The ability to choose WASD over arrow keys would be great. Can't really play the game currently. 

We apologize for this! Didn't think it would be an issue, as this has been the first time we've encountered a user with this keyboard. We would be glad to send you a refund.

It's alright, I got this as part of a bundle if I remember correctly, just a bummer that I can't play cause I'm sure I would've liked it.


I finished the game in about an hour.

Honestly, I don't think it's that DIFFICULT, most of the difficulty is due to bad controls. No offense to the dev, but there is no momentum mechanic, so the character doesn't keep moving in the same direction when you jump off a moving object, or let go of the movement key.

in addition, there are a few jumps that don't appear to have been playtested, the biggest is one where there's a couple sawblades right next to a checkpoint (luckily) where the gap is too high to clear with a single jump, but too low to clear with a double jump, so you have to kind of do a double and then awkwardly fall through the hole.

The spinning parts were also terrible in general due to no friction either.

In addition, there were multiple parts that could be cheesed, most of the falling platform sections were basically skippable, most of the sliding puzzles allowed you to just flick into a blank wall and reset or skip mechanics, and the final boss has a spot where she can't hit you at all.

I'd give it a 6. I'd say it's not that bad but as the 6th game AppStir's put out, it really should be better


Just finished this and I really enjoyed it for the most part. Without giving anything away there is a section toward the end that I found very annoying to control, but I'm assuming that frustration was probably intentional, given the themes of the game. Great job!


thank you so much, joe! that's an incidental free pass for me because it wasn't meant to be annoying! haha. but the nature of the games gets me off the hook sometimes haha. thanks again for buying this!! more to come


this is a big coincidence, i downloaded your game on my cell phone a week ago, and i was browsing here and found it again, i just have one thing to say ... YOUR GAME IS GREAT.
NOTE: sorry if I noticed some English errors, I'm using google translator to write this, because I'm from Brazil :D

thank you for playing my games and for the kind words!

there seems to be a bug - if a controller is used, the character jumps, but the spike blocks don't rotate. is the game keyboard-only?

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Yes, it is keyboard only. In fact, glitches happen like no movement animation or sudden stopping when there is a controller plugged in. It's best to unplug the controller and play with keyboard. But I have seen someone find a way to use a controller for this and for HopBound.

Here is an excerpt from one of the steam reviews:

"The game doesn't have controller support, and even the developer wrote that into the store page. But I use a DS4 controller mapped partly to the keyboard, partly to the XB1 controller, and partly to the mouse using DS4Windows, and I am playing the whole game front to back using a controller only"


my bad. thanks for the information!

GREAT GAME!!!!!!!!!!

No... you're great!!! Thank you so much for playing!

This game is great for people who like difficult games. The gameplay is similar to Super Meat Boy, in that there's a lot of failure, but not much punishment. The narrative is fun to follow, too. Great job to the developer! :>


thank you so much! i hope you enjoy HopBound too. it's a bit different but if you liked DERE EVIL EXE i bet you'll enjoy that too :)


Very fun and tight platformer that I regually replay.

I rate it very highly

thank you so much for the kind words!


I noticed the song "Your Consenting Mind" at the end of the trailer. Neat to find a familiar song in this game!

Akuma Kira is one of the greatest gamedev/musicians ever!

Anyone know if there's ways to import these pc formats to Playstation VITA? So many would be amazing on handhelds!!

i don't have a playstation vita to know :(


-Made a Video. (Old Video)

thank you!

I love this game. It took me and my friend a long time to finish the game and it was worth it. I got to play the mobile version and the computer version on my friend's computer. I applaud AppSir, Inc. for such a great game... no for a great series for Dere .exe was a great game too. 

the series continues!


i have played the version avaiable on the play store, and it is pretty good


thank you! there's a new game too :)

yeah, i saw it :D


What the Engine?


Buildbox :)



): Free


Cool idea. Maybe have it not repeat voice lines over and over though? If you're going to die dozens of times per level it's really annoying to have to hear the same messages as many times.

noted. thank you for the feedback!


I played the first level and was intrigued. I would like to play the whole series, but I'm not sure which order to play them in. What would you suggest?




if you're into just the platformers: Proto DERE, DERE EXE, DERE EVIL EXE, then HopBound

if the whole series, just put in Sorority Rites and The Last Yandere after Proto DERE :)

Gave it a go...


Thanks a bunch!


thank you so much again! I'm interested in seeing you try the new one too :)

Not a problem! I didn't know there was a new one. If you could link it to me at some point, that would be cool.

https://appsir.itch.io/hopbound. We just got back to making games again after two long years


Really great game. It's hard to make a 2d horror game and you really nailed it. The story is great and i like how it's tied into the gameplay, very cool.

VERY worth the money

thank you so much! you may be interested in a game we just released that's sorta like a standalone sequel to this one. HopBound

So I know you know that I know that you know that I've already played this game, but I figured I'd throw a formal review out there on the download pages. 

Anywho, this game is phenomenal. Everything from the nostalgic pixel style graphics to the rage platformer gameplay really brought back memories of DERE.EXE and other awesome platformers and meta horrors. I'm absolutely in love with the story you're telling with this series, and I don't want to spoil anything in the review. I'm definitely awestruck by how glitch-free this game is. You do a really great job as Dev to keep everything clean and working without fail or corruption in this series. I just hope everyone else is able to make the right decision like I did. Good thing too. G o  t in  t o. Go d th ng t  . G  d   in     . ------.

We are still here. ;)

On YouTube !

thanks again sega fan! btw there;s a new one and it's called HopBound :)

Deleted 201 days ago

where'd the video go?

What an amazing platformer retro style horror game!  This is really cool and different from most horror games I have tried!  Great job :D 


thank you again for the kind words! there's a new one too :)


Dere Evil .Exe is the followup to Dere .Exe, a game I randomly stumbled upon back in February of this year.

Dere Evil .Exe extends the universe, raises the bar and makes me excited for what the future of the Dere series can go -- whether a return to visual novels, more of these action platformers or a whole new direction.

The original Dere .Exe really impacted me (and many others) in a way I wouldn't have expected. AppSir is an underapreciated developer and one I want to support in every possible way. I've purchased Dere Evil .Exe across all platforms, because I believe in them that much. Do yourself a favor and play this game.

I'll post my playthrough below if you get stuck or find it too hard, but seriously -- drop the $1 on this gem and support a great studio.