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System Error: Godkiller: [ERROR - UNREGISTERED]
He spent six years building game systems. Then the System built itself around him — and decided he was a bug that needed to be deleted.
When an alien integration event crashes Earth into a real-world RPG overnight, every human being receives a class assignment. Every human being except Marcus Cole.
Marcus gets an error message.
[ERROR - UNREGISTERED]
Registration INVALID
Corrective PENDING
As a senior game developer in Chicago, Marcus has spent his career hunting glitches, patching edge cases, and building systems that work the way they should. Now he is the edge case. His unregistered class can absorb abilities from enemies — corrupted, unstable versions that degrade with every use — and the System has already queued a correction protocol to eliminate him before he corrupts the Integration.
He has roughly ninety days before the next protocol arrives. Longer if he can stay off the System's radar. Shorter if he keeps using his class the way it was never meant to be used.
Joined by a combat medic who tracks his stability numbers better than he does, a twenty-year-old Summoner who names all his summons, and a retired Marine who has made his peace with mortality in ways that are either reassuring or deeply alarming depending on the day, Marcus has to do what he has always find the bug, understand the system, and figure out how to make the broken thing work before the deadline hits.
The deadline, in this case, is a correction protocol designed specifically to unmake him.
34% and counting down.
System Godkiller is the first book in the System Error series — a LitRPG apocalypse novel for readers who want tight mechanics, a voice that earns every laugh, and a party worth fighting for. Fans of Dungeon Crawler Carl, Defiance of the Fall, and He Who Fights with Monsters will find the power progression they expect and the character depth they didn't know they were missing.
Book 1 stands alone. The System does not.
When an alien integration event crashes Earth into a real-world RPG overnight, every human being receives a class assignment. Every human being except Marcus Cole.
Marcus gets an error message.
[ERROR - UNREGISTERED]
Registration INVALID
Corrective PENDING
As a senior game developer in Chicago, Marcus has spent his career hunting glitches, patching edge cases, and building systems that work the way they should. Now he is the edge case. His unregistered class can absorb abilities from enemies — corrupted, unstable versions that degrade with every use — and the System has already queued a correction protocol to eliminate him before he corrupts the Integration.
He has roughly ninety days before the next protocol arrives. Longer if he can stay off the System's radar. Shorter if he keeps using his class the way it was never meant to be used.
Joined by a combat medic who tracks his stability numbers better than he does, a twenty-year-old Summoner who names all his summons, and a retired Marine who has made his peace with mortality in ways that are either reassuring or deeply alarming depending on the day, Marcus has to do what he has always find the bug, understand the system, and figure out how to make the broken thing work before the deadline hits.
The deadline, in this case, is a correction protocol designed specifically to unmake him.
34% and counting down.
System Godkiller is the first book in the System Error series — a LitRPG apocalypse novel for readers who want tight mechanics, a voice that earns every laugh, and a party worth fighting for. Fans of Dungeon Crawler Carl, Defiance of the Fall, and He Who Fights with Monsters will find the power progression they expect and the character depth they didn't know they were missing.
Book 1 stands alone. The System does not.
623 pages, Kindle Edition
Published March 17, 2026
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