Over the past two months, our team has encountered four critical, project-threatening failures related to Unreal Engine serialization across three separate titles. The most recent incident resulted in the loss of an entire level — a failure that occurred despite standard version control and recovery practices.
Notably, these issues were absent in earlier engine versions. Recent releases have introduced instability severe enough to compromise production timelines, data integrity, and overall project viability.
At this stage, Unreal Engine no longer meets the reliability standards required for professional development. As a result, we are evaluating a transition to alternative engines that demonstrate stronger long-term stability, clearer regression control, and a greater emphasis on core systems robustness.
We are increasingly concerned that Unreal’s development priorities have shifted away from foundational engine stability toward rapid iteration and monetization-driven feature delivery. Persistent core issues — particularly in serialization and asset integrity — remain unresolved while new versions continue to ship.
Epic Games has built Unreal Engine on the trust of its developer community. That trust is eroded when foundational systems are allowed to regress without timely remediation or transparent accountability.
We urge Epic to pause aggressive version rollout, prioritize stabilization of existing systems, and address long-standing engine-level failures before expanding feature scope. Sustainable engine development depends on reliability first — without it, developers cannot build with confidence.