Choose Mundaun
Choose Mundaun if you want an Action and Adventure experience. On Steam, it's Steam Deck Verified, so handheld play works out of the box. Mundaun launched in 2021.
Mundaun vs Behind The Backrooms : Lost Levels
Mundaun and Behind The Backrooms : Lost Levels both land in Indie on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both are Indie games on Steam. Mundaun (2021) is 4 years older than Behind The Backrooms : Lost Levels (2025). Behind The Backrooms : Lost Levels is currently ~90% cheaper on Steam than Mundaun (1.99 USD vs. 19.99 USD). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Behind The Backrooms : Lost Levels
Choose Behind The Backrooms : Lost Levels if you want an Early Access experience. On Steam, it's currently about 90% cheaper on the Steam Store. Behind The Backrooms : Lost Levels launched in 2025.
Both Mundaun and Behind The Backrooms : Lost Levels sit in Indie on Steam, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Mundaun |  Behind The Backrooms : Lost Levels | |
|---|---|---|
| Released | 2021 | 2025 |
| Genres | Action, Indie, Adventure | Indie, Early Access |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 19.99 USD | 1.99 USD |
| Steam reviews | 93.4% positive (894 reviews) | 7 reviews |
| Multiplayer | Single-player only | Single-player only |
| Developers | Hidden Fields | SupKai |
Side by side
- Both are Indie games on Steam.
- Mundaun (2021) is 4 years older than Behind The Backrooms : Lost Levels (2025).
- Behind The Backrooms : Lost Levels is currently ~90% cheaper on Steam than Mundaun (1.99 USD vs. 19.99 USD).
- Mundaun is Deck Verified on Steam Deck; Behind The Backrooms : Lost Levels has no Deck rating yet.
Mundaun vs Behind The Backrooms : Lost Levels — FAQ
- Should I play Mundaun or Behind The Backrooms : Lost Levels first?
- If you want chronology, Mundaun (2021) came out before Behind The Backrooms : Lost Levels (2025). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Mundaun and Behind The Backrooms : Lost Levels similar?
- They overlap on Indie on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Does Mundaun run on Steam Deck?
- Yes — Mundaun is rated Deck Verified by Valve. Behind The Backrooms : Lost Levels doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.