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Mutators are a system in Streets of Rogue 2 intended to let players change how the game plays by overriding default rules. The developer has said he plans to allow a large number of his official design decisions to be totally subverted through the mutators system, reflecting a design goal of making the game's systems flexible and easy to mess with. Because the game is in development, the exact list of mutators and which design defaults can be subverted has not been finalized.
What Mutators Do
Mutators are game modifiers that change the gameplay conditions of a run. They are intended to cover broad categories of design: how punishing a death is, how fragile the environment is, what kind of world the player generates, and similar high-level design parameters. By layering mutators on top of a run, players can take the developer's default ruleset and tune it to their own preferences.
World Mods and Scenarios
In the developer's roadmap, the run modifiers are grouped as World Mods, which differ from the original game's simple on-or-off mutators by exposing adjustable numeric values and dropdown options across a large range of game elements. A second, more elaborate category called Scenarios is under consideration for changes that a set of World Mods could not easily achieve on its own, such as new starting positions and win states, custom maps, or scripted narrative events. Configurations of these settings can be saved and shared with other players.
Confirmed Mutator Concepts
Mutator Concept | What It Does |
|---|---|
Destruction | Modifies overall fragility of environments, making structures easier or harder to destroy. |
Death Penalty Variants | Designed to tweak how punishing or forgiving dying is, addressing the spread of players who want either chill runs or more dangerous ones. |
Water-Based World | A pirate-style world composed primarily of islands, intended to make greater use of boats. The developer has discussed this as an idea rather than a committed feature. |
Permadeath | Makes a character's death permanent rather than applying the standard, less punishing death penalty. Confirmed as an optional mutator rather than a default rule. |
Subverting Default Design
Beyond named mutator concepts, the developer has framed mutators as a way for players to override decisions they disagree with. If a design choice the developer made does not match a player's preference, a mutator should let the player flip it. The intent is for the mutator system to act as a pressure-release valve where alternative play styles are first-class, not just developer-approved difficulty settings.
Mutators in the Alpha Demo
Mutators were not in the alpha demo at launch, and the developer noted that he might slip some in before release or shortly after the demo became available. With the demo since removed from Steam, mutators in their final form will land alongside the Early Access build.