UNDEMON

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Go on a mysterious adventure as a ghost. Various stages that stimulate a sense of challenge are waiting for the ghost Luna. If you want to feel the genre of 2D platformer in the 90s, try it!

Developer: WEST SUN
Released: 20 Nov 2021
Price: $14.99
Platforms

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Update posts

0 posts

Posts announcing an update, tagged as patch notes or not

Last 90 days · as of 4 Nov, 00:06 UTC

How this is measured

Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.

News checked every 30 days. Observed since 4 Nov 2026.

An announcement is not a build. Developers can ship updates without a post, or post about several updates at once.
Untagged posts are recognised from their words, so a few updates are missed and a few other posts may be counted. Tagged posts are marked Patch notes on the Updates tab; recognised ones are marked Update.
Older posts are being read back through each game's history, most played games first, so months before October 2026 fill in over the coming days.

Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology

Announcements

Launched a summer sale. Patch notes
27 Jun 2024 · Community Announcements
There have been some updates. Update
12 May 2024 · Community Announcements
60% discount event Patch notes
14 Nov 2022 · Community Announcements
Add New Mode!!
15 Aug 2022 · Community Announcements
Hello, my solo game "UNDEMON" has been released.
14 Nov 2021 · Community Announcements

From the game’s Steam news feed, last checked 4 Nov, 00:06 UTC. An announcement is not a build: games can update without posting. Every public build we saw is on the Builds tab.

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