
Game Overview
A battlefield crowded with shambling corpses becomes a playground for explosive dark magic in this survival-focused bullet hell RPG. You play a necromancer seeking greater power while swarms of undead close in from every direction, turning each encounter into a frantic test of positioning, spell timing, and controlled chaos. The tone is gleefully grim rather than oppressive: enemies burst apart, bodies become ammunition, and the screen steadily fills with your own summoned forces. Solo players can build their ideal death mage, while local co-op lets two players coordinate spells and surviving heroes on the same screen.
Runs begin with deliberate squad preparation before shifting into fast, enemy-dense action. Your necromancer draws abilities from five sinister disciplines—raising minions, calling creatures, manipulating blood, wielding souls, and spreading curses—and the real goal is finding combinations that reinforce one another. A corpse blast might gain elemental effects, terrified enemies can be pinned by undead servants, and blood sacrifices trade safety for devastating area damage. Alongside spell selection, you direct distinct heroes, collect artifacts, and improve practical stats such as cooldown recovery, movement, durability, and damage, allowing a weak early setup to grow into a screen-clearing machine.
Eight randomized stages give each attempt a different flow, so success depends on adapting a build rather than memorizing every encounter. The mix of squad planning and auto-attacking survival combat gives it a different flavor from Vampire Survivors-style games: you are not merely collecting upgrades, but shaping a small army and stacking deliberately nasty magical interactions. Its appeal lies in experimentation, especially for players who enjoy discovering overpowered synergies and watching a careful build snowball into absurd destruction. Fans of roguelite horde games, Diablo-like buildcraft, and co-op action RPGs should find plenty to enjoy, while newcomers benefit from beginning with straightforward minion or explosion-focused setups before tackling more demanding hybrid builds.
Screenshots
Installation
- Select the Download button at the top of this page to open UploadHaven.
- On UploadHaven, wait for any countdown, then select Free Download. Optional: UploadHaven Pro for faster downloads.
- When complete, extract the archive to a CODEX MORTIS folder using 7-Zip.
- Open the extracted folder and start the game normally.
- For errors, check Setup Guide & Troubleshooting below. Keep your security software enabled.
System Requirements
- Requires a 64-bit processor and operating system
- OS: Windows 11
- Processor: Intel Core i3-2100 / AMD FX-4300
- Memory: 4 GB RAM
- Graphics: NVIDIA GeForce GTX 650 / AMD Radeon HD 7750 / Intel HD Graphics 4000 / 1 GB VRAM
- Storage: 140 MB available space
- Sound Card: Any
Setup Guide & Troubleshooting
How do I fix missing DLL errors for CODEX MORTIS (v3.6.396)?
After extracting CODEX MORTIS (v3.6.396), navigate to the _Redist or _CommonRedist folder inside the game directory and install DirectX, Vcredist, and any other dependencies included.
What should I do if the downloaded file is corrupted?
The full archive is 552.16 MB — make sure your download completed fully before extracting. Use 7-Zip to extract the files. If you still see a "file corrupted" error, re-download and try again.
Do I need to run the game as administrator?
Usually, no. Start the game normally from the extracted folder. If you see a permissions or save error, check that the folder is writable and follow the game's documented fix. Only grant administrator access when a trusted game's specific setup requires it.
How do I update my GPU drivers for this game?
The game won't launch — what should I try?
Check that extraction completed and your PC meets the system requirements. Note any error message before choosing a fix. If it identifies a missing runtime, install the required DirectX components or Microsoft Visual C++ Redistributable from Microsoft.
My antivirus is blocking the game — is it safe?
A warning needs to be investigated; the download source alone cannot confirm that a file is safe. Keep your security software enabled and review the detection details. Do not run or restore a flagged file unless you have verified that it is a false positive. If you are unsure, leave it quarantined.