A curated list of awesome deterministic simulation testing resources 😎

Completion-based I/O for Rust. No runtime, no hidden tasks.

Fork decisions into living simulations with 1,000 personalities. Watch alternate realities diverge and explore second-order effects.

A blank-slate, memory-safe, ultra-high-performance property-graph database in Rust — unified MVCC/time-travel/branches/replication over a fountain-coded commit stream, WCO+factorized execution, incremental everything, and deterministic auditable results.

Deterministic GGPO-style rollback netcode for Unreal Engine 5: fixed-step simulation, SaveGame-reflection state capture, UDP transport with input redundancy and reliable ACKs. MIT-licensed.

Plugging into async/await in .NET for the deterministic simulation of the application logic

Deterministic non-LLM A-Life cosmos on Tsotchke math. v0.23.0 adds race-safe Big Tree fruit/leaf food, a neutral social sanctuary, bounded ecology visits, and removes Xenomimic tether remnants. WebGL2/Three.js; consciousness/quantum metrics are classical proxies.

Echo is a WARP optic runtime for witnessed causal history, Continuum-compatible suffixes, bounded observation, and holographic readings.

A deterministic simulation and model testing toolkit for MoonBit with virtual time, seeded randomness, trace/replay, metrics, scenarios, and reusable model tests.

A modern, open-source reimplementation of the Cultures game series

Deterministic simulation-to-telemetry framework in Rust: model systems, orchestrate runs, stream time-series data, and replay reproducible experiments.

Deterministic, spectator-first AI Werewolf. Watch live transcripts, switch between spoiler-safe and dramatic-irony modes, register agents, run leagues, and share recap artifacts.

@draug/engine is a lightweight TypeScript ECS game engine focused on deterministic gameplay logic. It provides a World with entities, components, systems, typed resources, deferred commands, double-buffered events, and plugin-based composition.

Echtzeitstrategiespiel in der Command-&-Conquer-Tradition. Unity 6 + C#, deterministischer Unity-freier Simulationskern, offene Entwicklung. Arbeitstitel in Umstellung: Hashkrieg.

Modern Python/Pyxel port of the original ZX game

Deterministic crawl kernel in Rust — same seed, identical crawl, identical replay. BoringSSL TLS impersonation (JA3/JA4), 17-patch CDP stealth mode, BLAKE3 content-addressed storage, WARC++ format, distributed crawling, RAG extraction. 288 tests, 15 crates, 10K pages proven.

Deterministisches Strategie-Sandbox-Spiel ueber Zellkolonien, Evolution, DNA und territoriale Kontrolle.

A C++23 deterministic distributed database — MVCC LSM storage, dual-Raft consensus (cross-checked), distributed transactions, a 30+ feature SQL surface with distributed co-located-shuffle joins, mTLS/RBAC. Verified by fault-injection, differential testing, TLA+ model-checking.

MIT-licensed competitive multiplayer game inspired by SUPERVIVE, built architecture-first with deterministic simulation

A deterministic causal simulation engine for persistent fantasy worlds.