Remix

Rain World: Remix, game version 1.9, is the newest major game update, released for free alongside the Downpour DLC. It exists as the current version of the base game and adds a native mod menu that can be used to enable new official and unofficial 'modded' content. The official mods are:
 * Devtools
 * Rain World Remix
 * More Slugcats
 * Jolly Co-Op
 * Expedition

Player-developed mods can be uploaded to the Steam Workshop via the upload-arrow button in the mod menu. Uploaded mods can be downloaded by subscribing in the Steam Workshop, after which they can be activated in-game via the Remix menu. Some mods require game relaunch on activation.

Mods can also be manually downloaded by placing the relevant folder in the mods folder under StreamingAssets, after which they are also accessible via the Remix menu.

Steam store description

 * Uncover the most popular mods from the thriving modding community with Steam Workshop Support.
 * Toggle new features and comprehensive customization options in Remix to suit your individual needs.
 * Learn new tips and tricks with updated tutorial messages to help players understand Rain World's intricate ecosystem.
 * Control your unique campaign with accessibility, speedrun, and difficulty options sculpted to your particular taste and style.

Rain World Remix
Rain World Remix contains many options to customize the game experience, including quality-of-life, difficulty, speedrun and 'vanilla reversion'. These are organized under three separate tabs.

Presets
''The options below can be used to quickly reset all settings to preset values. These are recommended starting points for different playstyles.''
 * Remix: Standard Remix settings. Many mechanical tweaks that may mix up the way the game is experienced.
 * Classic: Similar to the original Rain World experience, but with a few quality of life settings enabled.
 * Relaxed: Settings designed to make the game significantly easier, but may weaken the overall game experience.

HUD
[*] If the game consistently loads quickly, these may never show up. [†] These do not show up in More Slugcats campaigns.
 * Speedrun timer: Your total playtime for a character will always be visible as a UI element in-game during campaigns.
 * Hide rain timer in safe areas: Hide the remaining cycle time while in maps that are safe from the rain.
 * Loading screen tips: Periodically shows tips and tutorials during the loading screen between cycles.[*]
 * Extra tutorials: Introduces a few in-game tutorial messages for certain mechanics and scenarios.[†]
 * Stronger bottomless pit indicators: Makes the death gradient on bottomless pits more visible.
 * Show underwater shortcuts: Prevents underwater shortcut symbols from being obscured by the water layer.
 * Visual breath meter: Show a visual indicator on the UI of your remaining breath time. (This is visually similar to Saint's warmth meter)
 * Slug senses: Show icons of nearby creatures on the minimap. (Dead creatures will show as smaller, lopsided icons)
 * Rain timer tick-tock: The rain timer makes a tick-tock noise while the UI is visible.
 * Fast map reveal: Increases the speed that the minimap reveals itself.
 * Threat music visual pulse: Shows a visual pulse on screen when threats are nearby. (This pulse is red and increases in size according to severity of threat)

Jolly Co-Op
Main article: Jolly Co-Op

Expedition
Main article: Expedition

More Slugcats
Main article: Downpour

Gameplay Assists

 * Disable shelter failures: Prevents the chance of waking up early before the rain has stopped.
 * Disable precycle flooding: Prevents the chance of a region being flooded during a shelter failure scenario.
 * corpses have max Karma: If enabled, all Scavenger corpses in Artificer's campaign always have the maximum possible Karma level.
 * Lossless Scavenger corpses: If enabled, Scavenger corpses in Artificer's campaign don't lose Karma after each cycle. This option significantly decreases the difficulty of Artificer's campaign. The intended gameplay loop is to have to actively hunt fresh corpses. It is recommended you only use this as a last resort. Are you sure you want to disable this mechanic?
 * Artificer Explosion Capacity: The maximum number of subsequent explosion actions Artificer can perform before dying.

Cheats
''This menu contains cheats to unlock content early. It is not recommended to use them on a first playthrough. Are you sure you want to continue?'' ''The following cheats unlock content you would normally obtain via finding unlock tokens. Are you sure you want to continue?'' ''The following cheats contain spoilers. Are you sure you want to view these?''
 * Unlock all campaigns: Normally requires completing previous campaigns to unlock.
 * Unlock all arena characters: Normally requires finding Green unlock tokens in the campaign maps.
 * Unlock all arenas: Normally requires finding Orange unlock tokens in the campaign maps.
 * Unlock all sandbox creatures: Normally requires finding Blue unlock tokens in the campaign maps.
 * Unlock all sandbox items: Normally requires finding Blue unlock tokens in the campaign maps.
 * Unlock all safari regions: Normally requires finding Red unlock tokens in the campaign maps.
 * Unlock all challenges: Normally requires completing campaigns and clearing previous challenges.
 * Unlock all collections: Normally requires delivering pearls and finding broadcast tokens in the campaign maps.
 * Unlock the gate: Normally requires completing Gourmand's campaign.
 * Unlock s : Normally requires completing Gourmand's food tracker.
 * Unlock Developer Commentary mode: Normally requires completing all Challenge Mode challenges.

Devtools
Main article: https://rainworldmodding.miraheze.org/wiki/Dev_Tools 

Spawning key items
5: Spearmaster 6: Hunter 7: