Case study

Vault Engine: rebuilding Fallout and Fallout 2 in Rust

Vault Engine reimplements Fallout and Fallout 2 as a Rust engine that reads the user's retail DAT archives. Its modules cover DAT formats, the INT script VM, combat, AI, saves and rendering, with behavior built from written clean-room specifications and checked through state hashes and trace oracles.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C1 partial scope or analysis entry

Stars: 8
Last commit: 2026-11-01
Language: Rust
License (GitHub): Apache-2.0

GitHub data as of 2026-11-10

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Evidence

Demo screenshot from the project's public documentation

Observed: Code, documentation, download and demo observed; a full-reconstruction candidate for manual Class 0 review.
Scope: Partial
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: The user's own Fallout or Fallout 2 DAT archives are required.
Prerequisites: Linux, Windows or macOS is supported; building from source requires Rust 1.88 or later.
License: Apache-2.0 license.

Cite

BibTeX

@misc{vault-engine-case,
  title = {{Vault Engine: rebuilding Fallout and Fallout 2 in Rust}},
  howpublished = {\url{https://github.com/mikyowski-ui/vault-engine}},
  url = {https://github.com/mikyowski-ui/vault-engine},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/vault-engine-case/}}
}

Plain text

Vault Engine: rebuilding Fallout and Fallout 2 in Rust. https://github.com/mikyowski-ui/vault-engine (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/vault-engine-case/

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Primary sources

README.md GitHub · mikyowski-ui/vault-engine · Revision 3adeac9