Slumbering Feline - Nightmare

Overview

Slumbering Feline - Nightmare is a Steam DLC connected to Slumbering Feline. It was prepared by The Flavare, published by The Flavare, and released on May 14, 2026. This page focuses on the store listing, screenshots, price, requirements, and its relationship to the main game rather than presenting it as a normal live-player game.

Store reviews and relationship

Slumbering Feline - Nightmare is a DLC, so player-count observations and tracked peak are not meaningful in the same way they are for a base game. The useful signals here are reviews, store recommendations, price, platform support, and the link back to Slumbering Feline.

Language and system requirements

Slumbering Feline - Nightmare is available in 1 languages including:

3 regional rating boards including dejus, steam germany, and igrs. Steam has not published complete Windows, macOS, and Linux requirement text for this game yet.

Recommendations and store value

Slumbering Feline - Nightmare has recommendation data pending. Twitch streaming and unit-sales estimates usually belong on the parent game page, while this page is better for checking the DLC, price, media, and store details.

Slumbering Feline - Nightmare overview details

Slumbering Feline - Nightmare is tracked as Steam Store content with pricing, reviews, packages, media, requirements, and its relationship to the parent app.

Steam Store description

Momo’s nightmare deepens. Escape from the unpredictable nightmare slumber! All enemies are enhanced to prevent Momo from escaping! New Nightmare Enemies variants More sturdy, move fast, fast respawn and enhance attack. All attacks will more deadly and affect Nightmare Mark Nightmare Mark : Slowly reduce Mental Health overtime Nightmare Enemies will randomly spawn in a determined place every new game. Enemy Weakness enhanced into Nightmare Weakness and hidden by default. Nightmare Weakness will be revealed when aimed or by Moonlight Celestial Rune Nightmare Exclusive Celestial Runes Nightmare Exclusive Celestial Runes New Celestial Runes will available exclusively on Nightmare : Moonlight : Reveal nearby Nightmare Weakness . Nightmare Antibody : Immune to Nightmare Mark . Also, Momo's Runes Slot increased from 3 to 4 slots. Nightmare Exclusive Achievements New achievements added exclusive for Nightmare Mode How to Unlock and Play Nightmare Nightmare is optionally unlocked after Momo escaped once AND requires ownership of the Nightmare DLC . You can still start play Nightmare directly even before unlocking it, BUT it's recommended to play and escape at least once first. Then, to play Nightmare , start a New Game from the Main Menu and select Nightmare . Notes Recommended only for players who really enjoy hard challenges.

SteamPulse editorial summary

Slumbering Feline - Nightmare is listed as a DLC with $1.99. It supports Windows and Linux, belongs to Single-player, Downloadable Content, Steam Achievements, Full controller support, Adjustable Difficulty, Stereo Sound, Steam Cloud, and Stats, and is associated with Adventure, Casual, and Free To Play. Because it is a DLC, SteamPulse focuses on its Store listing, relationship to the parent app, media, packages, and metadata rather than treating it like a standalone concurrency page.

Support and legal notes

Real questions answered from SteamPulse data, including live players, monthly momentum, review sentiment, regional audience signals, Twitch activity, and current Steam pricing.