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nullptr is an action puzzle game that requires careful planning and precise execution. Once you're connected to one of the servers ports, you have 30 seconds to hack security systems, reprogram the server, evade sentinel programs and download data. Your goal is to find or create safe routes to download all databases in each server without being traced.

Hacking servers


You start each level disconnected from the server and must choose an open port to start your run. Ports are color coded and give you access to different parts of the server and also to different systems. Once connected to the server, you have the option to open more ports by installing backdoors that will give you additional entry points to attack the server.

Connection route


In order to download the server data, you must build a connection from an entry point to the database. The connection length determines the download time so it is wise to choose short routes. You will also need to evade security systems in your route, like firewalls that will block downloads. The route you take is also important to open gates in some servers. Data nodes included in a route contribute with their color to the connection profile that is used to match and open the gates.

Sentinel programs


Each server in the game is owned by one of the four megacorporations in the world of nullptr. In order to protect their data, each megacorporation has installed their own sentinel programs whose goal is to trace invaders and eliminate them. Fortunately, you are a hacker and once you understand how each program works, you can manipulate them by choosing specific routes or reprogramming the server using the stack memory.
nullptr
Jeferson SilvaDeveloper
Jeferson SilvaPublisher
2024Release
🎹🖱️ Keyboard + Mouse
🕹️ Partial Controller Support
🎮 Full Controller Support
6 user reviews (6 reviews)
Public Linux Depots:
  • [0 B]
Patch notes - Hotfix v1.13

LEVEL ADJUSTMENTS\n\n

    \n
  • #315 - Adjusted yellow node position so that the player cannot skip the lesson to be learned in this server\n
\n\nOTHER IMPROVEMENTS\n\n
    \n
  • Added Steam rich presence\n

[ 2025-12-08 16:18:46 CET ] [Original Post]
Patch notes - Hotfix 1.12

BUG FIXES\n\n

    \n
  • TIME - FIxed a bug that allowed the player to cross the clock hands undetected by using a tunnel\n
  • SYMBIOTE - Fixed a bug that delayed the route profile update when the SYMBIOTE exploded \n
\n\nOTHER CHANGES\n\n
    \n
  • Lethal difficulty - Added a new difficulty where the run ends immediately if the player is detected \n
\n

[ 2025-12-05 13:20:37 CET ] [Original Post]
Patch notes - Hot fix v1.11

LEVEL ADJUSTMENTS\n\n

    \n
  • #320 - Reworked this stage to better introduce the MUTATOR sentinel\n
  • #323 - Small tweak to center area to add an alternative safe route\n
  • #415 - Small tweak to the top right area to reduce the need for fast movements in the later part of the solution\n
\n\nNARRATIVE\n\n
    \n
  • Fixed some errors in the brazilian portuguese localization.\n
\n\nBUG FIXES\n\n
    \n
  • FLYTRAP - Fixed a bug introduced in the last patch that allowed the player to occupy the same node as a FLYTRAP without being detected\n

[ 2025-12-01 12:11:16 CET ] [Original Post]
Patch notes - Minor update v1.1

LEVEL ADJUSTMENTS\n\n

    \n
  • #103 - Updated tutorial text for the brazilian portuguese localization\n
  • #106 - Tutorial text and level layout changed to better communicate how the two types of sentinels work\n
  • #210 - Level tweaked so that crossing the bottom gate requires less speed\n
  • #213 - Removed some firewalls that were not meaningful for the solution required for this level\n
  • #214 - Increased the area of influence for the leftmost TENGU sentinel. This should give a bit of breathing room to the player without changing the intended solution\n
  • #314 - Small tweak to the top area in order to give more time to execute the intended solution\n
  • #315 - Shortened some paths while keeping the same puzzle elements and required solution\n
  • #316 - Changed level layout while keeping the same puzzle elements and required solution\n
  • #317 - Changed firewall color from green to white in order to allow the player to reset tracing while holding green nodes\n
\n\nBUG FIXES\n\n
    \n
  • FLYTRAP - Fixed a bug that sometimes caused the player to be detected when removing a green node from route while moving into a FLYTRAP. This should be safe to allow the player to backtrack and not be detected by the sentinel\n
  • SYMBIOTE - Now the sentinel only resets its position if it were attached to the connection or dead when the player disconnects\n
\n\nOTHER CHANGES\n\n
    \n
  • Scanlines should be disabled by default when running the game for the first time\n
\n

[ 2025-11-28 13:55:51 CET ] [Original Post]
Patch notes: Hotfix v1.02

LEVEL ADJUSTMENTS\n\n

    \n
  • 103 - Updated tutorial text and added a white database to better communicate that white resources are public and accessible regardless of connection color.\n
  • 515 - Added a bit of breathing room at the top of this level\n
\n\nIMPROVEMENTS\n\n
    \n
  • A locked server should now show what servers should be hacked to unlock it\n
  • Run time indicator now shows minutes and seconds once the run exceeds 60 seconds\n
\n\nBUG FIXES\n\n
    \n
  • Server #118 should now unlock correctly if the player has completed #207 in the demo version\n

[ 2025-11-27 12:56:38 CET ] [Original Post]
Patch notes: Hotfix v1.01

LEVEL ADJUSTMENTS\n\n

    \n
  • 409 - Adjusted the firing interval for the right side PULSAR\n
  • 411 - Repositioned a yellow data so that it requires less fast movements to grab safely\n
\n\nBUG FIXES\n\n
    \n
  • Achievements now unlock as soon as you reach the required ghost run percentage\n
\n\nNARRATIVE\n\n
    \n
  • Small text corrections for the brazilian portuguese localization\n

[ 2025-11-26 16:40:31 CET ] [Original Post]
Hacking begins on 25.11.2025

The wait is almost over. The system is armed, the sentinels are watching, and the final challenge now has a date: November 25, 2025.

Get ready to infiltrate corporate servers, manipulate adaptive defenses, and uncover the loopholes that turn threats into opportunities.

Add to your wishlist now and be among the first to become a ghost in the system.

[ 2025-09-02 19:00:20 CET ] [Original Post]
NULLPTR Dev Broadcast

Jeferson Silva, the developer of NULLPTR, trying to hack some servers in the game demo!

[ 2024-05-26 12:48:52 CET ] [Original Post]
Post Steam Next Fest 2024 demo update

First of all, I'd like to say a huge thank you to everyone who has downloaded and played the NULLPTR demo over the last few weeks! Since the release of the first version of the demo, I've received a lot of feedback and suggestions for improvements that I believe will make the game better and better, starting with the update I've just released!

Let's see what's new:

1. The game has a slow start

One of the points addressed in this update has to do with the start of the demo. Many people felt that the game starts very slowly and that the first few stages aren't that interesting. Based on this, I've changed the order of some stages, remade others and tried to bring some important lessons to some of them. A side effect of these changes is that you may have trouble unlocking the levels if you're still at the beginning. As a solution, I've left a command in the demo to unlock any level by selecting it and pressing the H key on the keyboard. If you prefer, you can also reset your progress and everything should work normally.

2. Quality of life

Some people have suggested adding a sound effect to indicate when time is running out. As an experiment, I've added a sound warning when there are 10 seconds left and another when there are only 5 seconds left. These sound effects are synchronized with the visual effect of the edge of the screen and should help you keep in mind the right time to disconnect.

Another request that I thought was valid and that has been added to the demo are the warnings about dangerous entrances. Whenever there is a risk of being hit by a sentry when you enter one of the server's ports, it will be marked with a skull icon. This doesn't stop you from trying your luck and entering through that door, but it does serve as a reminder that you probably need to reconnect through another door and try to find a safe solution. I'd like to take this opportunity to emphasize that all the stages have been designed so that you don't have to rely on luck to solve them. There is always a way to guarantee your success.

Finally, when I watched some videos of people playing the demo, I realized that it's quite common for people to walk very carefully so as not to make involuntary movements that could cause them to lose a run. To help a little with this, I've added a command so that you can always walk one grid space at a time. You can hold down any of the [shift, space, control] keys on the keyboard or any of the shoulder buttons on the gamepad so that movement is restricted to step-by-step mode.

3. Adjustments to some stages

I took the opportunity to make some small adjustments to some stages that required very fast movements. In some cases, this allowed for unforeseen solutions that eliminated the puzzle aspect. As an example, level 407 was a rather cruel level because it required the person to mentally solve a complex problem with many states and execute it in too short a time. What's more, in this level it wasn't possible to return to disconnect because of a trap that blocked the way back. The adjustment I've made here is quite small, but I believe it will make this level much less frustrating.


If you've already played the demo, I invite you to revisit the levels and try out these small changes. Also take the opportunity to recommend the game to other people you think might like it!

[ 2024-02-16 00:23:50 CET ] [Original Post]
NULLPTR demo is available now!

My name is Jeferson Silva and I'm the developer of NULLPTR. This is a project that has been in my head for over 10 years and after all this time I feel very fulfilled to finally be able to make this demo public. I'm very much looking forward to receiving your feedback and making this game better and better.

Talking about the demo, NULLPTR is an action-puzzle game involving a lot of planning as well as quick, precise movements. Most of the time you'll be able to manipulate the defense programs and also the elements of each server to make your job easier, opening up safe routes that will allow you to achieve the main objective: stealing all the data from the databases present on the servers. Once you know what to do, you can finish each stage in less than 20 seconds.

If you're put off by the time pressure factor and the need for quick movements, don't worry. The game has an accessibility setting to adjust the speed. What's more, failing a stage only means losing a few seconds as you can replay a stage as many times as you like.

If you find any of this interesting, I invite you to try out this demo and give me your feedback!

Demo features

  • Learn how to find vulnerabilities in security systems in 17 tutorial levels
  • Get to know the 4 megacorporations and their motivations by following the narrative
  • Hack more than 25 megacorp servers and try to remain invisible
  • Face the sentinel programs and find out how to deal with them
  • Revisit the stages you've already completed and try to improve your time

[ 2024-01-17 13:19:54 CET ] [Original Post]

Minimum Setup

  • OS: Ubuntu 12.04+
  • Processor: 2.0 GHzMemory: 2 GB RAMStorage: 100 MB available space
  • Memory: 2 GB RAMStorage: 100 MB available space
  • Storage: 100 MB available space
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