Script — Peroxide

Developed by independent game studio (and later open-sourced in early 2025), Peroxide Script ( .ps or .h2o2 ) was designed to solve a specific pain point: safe, concurrent mutation of game state without garbage collection stutter.

This allows modders to simulate "what-if" scenarios (damage prediction, UI previews, network rollback) without cluttering the live game state. It’s like Git for game variables. Most scripting languages pause the world to clean up memory. Peroxide uses reactive reference counting with a twist: objects self-destruct when their last stable reference disappears. The Bleach Operator creates ephemeral references that vanish automatically after the current frame.

channel "UI_Events" -> (event_type: string, payload: any) spawn fn update_health_bar() { loop { match recv("UI_Events", timeout=0) { ("damage_taken", val) => animate_red_flash(val) _ => skip } } } Peroxide Script

Is it the future of modding? Possibly for multiplayer, competitive, or simulation-heavy games. For a simple UI script? Probably overkill.

But as one modder put it on the forums: “Once you bleach, you never go back.” Author’s note: Peroxide Script is currently at version 0.9.2 (codename “Hydrogen Peroxide”). The 1.0 release is planned for Q4 2026. Developed by independent game studio (and later open-sourced

No more manual component lookups. The compiler optimizes queries into linear memory access patterns automatically. Mods often break when two scripts touch the same data. Peroxide enforces channel-based communication . Instead of shared memory, you send bleached copies through named pipes.

let enemy_health = 100 let preview = !> enemy_health - 20 // Creates a bleached copy print(enemy_health) // 100 (unchanged) print(preview) // 80 Most scripting languages pause the world to clean up memory

No locks. No deadlocks. Just data flowing one way. Because of the Bleach Operator, every script runs in a sandboxed revision . You can change a function, recompile the script, and the running game will automatically migrate live variables to the new version—as long as they’re stable.

// To commit the bleach back: enemy_health <-! preview // Stabilizes the change

archetype Player { health: f32, position: Vec3, inventory: List<Item> } system "damage_over_time" { query (mut health, @tag "burning") for each { health.current -= 5.0 * delta_time } }