- Optimization Update! - 29 October 2025
Hi everyone! While recently working on Kitty Combat I came up with some new ideas on how to optimize the game, which some of it translates over to Error 259. That being said I remembered how some people would have fps issues and have about 30 fps most of the time..... which is like super bad. SOOOOOOOO, I just went back through all off Error 259's code and painstakingly optimized most of the main things that should be in theory slowing the game down. Just a reminder too, any updates will only effect the dlc/complete version of the game.👍 In other words, YOUR GAMES SHOULD NOW RUN MUCH BETTERRRR 🎉✨✨✨✨ Ps. Thank you all again as always for supporting me and my games! 😄
- ERROR 259 REVIVAL UPDATE! - 22 August 2025
Added a New Cultist Floor Boss Added a New Cultist Floor Enemy Added a New Glitch Floor Enemy Added 10 New Items Reworked/Changed a few items Made it where now you can see the items you have at all times (not just when the game is paused) Fixed the slider colors on the Main Menu Settings with the BSOD colors Fixed Bug where "Mysterious Camera" T5 item wouldn't work on Jolt Fixed Bug where Necromancy and Tombstone T5/TF would cause the shopkeeper and certain bosses to be invincible Fixed Bug where The Boiler Floor and Freezer Floor would sometimes overlap Updated Low Graphics mode to remove more effects for better performance Added Sex................................................tant (Sextant item XD) Keep in mind this is only available through the Blood & Bombs DLC
- Blood & Bombs: Regular Update! - 15 October 2024
Added Golden Chest to the Shop (Costs 25 coins and has a guaranteed T4 Item) Added 3 New Items Added Achievment for killing the rare testing scarecrow Buffed Lil Crusher Bot (can now stomp on spider mines) Fixed a bug where you could push mimics outside the map Fixed a bug with Reynolds and the Old Rifle Item Fixed a bug where the 2 new items didn't appear visually in your inventory
- Blood & Bombs: Halloween Update! - 8 October 2024
Added 2 New T3 Items Added 1 New Abandoned Factory Enemy Added some Halloween lights and decor to the shop (will be removed after October) Buffed Menacing T3 Item (Now activates twice as fast) Buffed the vacuum speed for The Scorched Boss, along with adding a new mechanic to that attack (Now spawns and pulls in fire projectiles too)
- Error 259: Blood & Bombs DLC (Coming Soon!) - 27 August 2024
Hello Everyone! I'm excited to announce that development on the Blood & Bombs DLC has officially started and will likely be done sometime midway through september or so depending on how smoothly everything goes. This DLC is planned to cost $5 and contains: 2 New Playable Characters (Vamp and Shell) 2 New Alt Floors (The Boiler and The Arcade) 20 New themed Items 10 New Enemies (5 for each alt floor) 4 New Bosses (2 for each alt floor) 50 New Room Configs for every floor Keep in mind also that while I continue to work on the game after this DLCs release I won't be able to go back and update the base game since it will be overwritten by this. Meaning that getting this dlc will also come with constant updates, new additions, and so on while the base game will not when it's done. The same is said when another DLC comes out, just saying this in advance to clear up any confusion. Basically ju…
- Another Small patch - 25 August 2024
Fixed some item descriptions Slightly tweaked some items Dimmed the explosive light and made it only appear on damaging explosions (like landmines, explosive shot, barrels, and so on)
- Small patch - 24 August 2024
Fixed some small visual bugs
- Error 259 5.3 Update! - 23 August 2024
Finally reached the final base game goal of 259 Total items! (118 New Ones!) New mechanics and features with a lot of the new items More Special Item Synergies Added a 5% chance for a floor to be at "Night time" which will make the rooms have a night shader applied to it Added Light Flashes on explosions and gunshots for certain weapons Added more hats to some of the old items Reworked the Zookeeper achievment since there are way more companions now Updated/Improved Several Boss Cards standard balancing and small fixes Updated Credits Removed unused files to reduce game size This is the final Major update for the base game of Error 259, soon I'll start development on the first dlc, and then back to consistent small or medium updates!
- Error 259 OMEGA Update - 3 August 2024
Added the last 3 Bosses for the base game Added the last 2 Enemies for the base game Added significantly more props and other visuals to make rooms feel more in depth and detailed Added 1 New Item Added the last 40 room configs on each floor for the base game Updated the previous room configs with new props and enemies General balancing with enemies, bosses, and items Added the 10 winning skins from the Reskin Contest Updated/Improved some of the current skins Small bug fixes
- Visual QOL changes - 29 July 2024
Changed boss room floor to match the floor you're on Added a floor decal that can randomly appear in some Factory Floor room configs to fill up more negative space Slightly changed colors of explosions Fixed some small visual bugs
- Updated Multiplayer and Bug Fixes - 27 July 2024
Significantly updated online Multiplayer (there are a still a lot of known bugs and issues but it should be a lot less glitchy than before) Fixed a couple small bugs and visual changes
- Small Bug Fixes and Changes - 25 July 2024
Updated store page assets Added a shockwave visual effect for The World T5 item Fixed some positions for new room configs Changed oil/ash from enemies to no longer move from conveyors (originally I thought it would look good but turned out it didn't at all lol) Fixed a movement bug with the Monitor type bosses Fixed tint for some boxes on different floors Fixed an audio bug with the phone in the shop other small fixes
- Quick Patch - 24 July 2024
Fixed a position of a healing pylon in one of the new room configs (I accidentally swapped it's X and Y coordinates originally)
- Chests and Conveyors! - 24 July 2024
Added Conveyor Belts Added Chests (contain 3 coins and a health potion, opened by touching or shooting) Increased the max Player Speed to 450 (was 400) Added 3 new items Added and updated 10+ more room configs for each floor (50+ total) Re-sprited Snow decor in Freezer Floor Some bug fixes
- More enemies! - 23 July 2024
3 New Enemies Updated enemy guide Nerfed Turret Face firerate Updated Room Configs Various other bug fixes
- Spooky Scary Skeletons! - 23 July 2024
New skeleton skins for different floors (Necromancy T5 Item) Changed the color of the text in the Character Select to now be white so it's easier to read and pops out more Changed the power descriptions for locked characters to now say how to unlock them, and made the dark film over them a lot more visible Changed the dash for low fps again (now I-Frames last longer but no longer pushes you forward) Updated achievment descriptions for unlocking some characters to make it easier to understand Various other bug fixes
- Bug Fixes - 22 July 2024
Updated the visual for the version number on the main menu (forgot to the past few times) Fixed visual issues with character skins Various other bug fixes
- Byte Rework! - 22 July 2024
Completely Reworked Byte's gameplay and ability (no longer has a revolver and a passive damage buff toward bosses, along with no longer only being able to get almond water. Now has a suppressed pistol and the ability to go invisible for 8 seconds, non shop items are now a 50/50 between Enemy Intel which gives a 0.5 damage up or Brief Case which gives +10 max coins and 5 coins) Improved low fps dash updated low graphics mode Buffed Byte's starting firerate (was 0.6 and is now 0.5, also you no longer have to tap fire as him and can hold down the shoot button now)
- Big Bug Fixes - 21 July 2024
Fixed and buffed Jolts ability (now also applies a small permanent speed reduction to enemies in the room) Fixed chase enemy ai Added an FPS counter to the top right Fixed low graphics mode brightness Changed the dash to now become more of a parry when below 30 fps to prevent glitching through walls slightly increased the dash cooldown
- Jolt Rework! - 21 July 2024
Jolt's Gun Rework (No longer works on a reload system and now has an overheat, also includes the gun changing color to show your current temp level) Non copyright music added for the Freezer Floor Updated and reorganized Boss and Enemy Guides Lots of bug fixes
