The Longed-for Revenge of Undecember — patch notes and updates
Stored observation / content update:
Dated developer announcements recorded from Steam. Open the source for the complete update.
| Update | Date | Excerpt / source |
|---|---|---|
| V5.2.0 Update | 2026-10-27 | Update Notes 🎮 Reduced repetitive sections to lower the perceived difficulty. Improved translations. Optimized graphics and adjusted object placement and textures. And a new game is coming soon! 🍀 It's called Little Elementals. 🍀 Search for it on Steam and check out the demo! Thank you all for your continued support! ❤️ |
| v5.1.1 updated(Minor Adjustments) | 2026-10-18 | Minor optimizationSlight position adjustmentsSound changesOther small tweakssteamthumbsup |
| V5.1.0 Patch! | 2026-06-14 | V5.1.0 Patch NotesImproved overall performance and optimization Stability improvementsV5.0.0 Patch NotesDetails: Difficulty adjustments(Lucid significantly reduced, Sink reduced) Reduced and rebalanced frame counts (Lucid: 13, Sink: 26) Partial design updates Various minor improvements This is a solo-developed indie game. Your reviews mean a lot to me 😉 If you enjoyed the game, I’d really appreciate it if you could leave a review. Your feedback helps shape future updates and development. Thank you always for playing my game. I’ll keep working to bring you even better experiences in the future. Always stay happy :) |
| V.5.0.0 Release! | 2026-05-05 | Update Notes The update focuses more on improving progression and overall enjoyment. Details: Difficulty adjustments(Lucid significantly reduced, Sink reduced) Reduced and rebalanced frame counts (Lucid: 13, Sink: 26) Partial design updates Various minor improvements This is a solo-developed indie game. Your reviews mean a lot to me 😉 If you enjoyed the game, I’d really appreciate it if you could leave a review. Your feedback helps shape future updates and development. Thank you always for playing my game. I’ll keep working to bring you even better experiences in the future. Always stay happy :) |
| V.4 Release! | 2025-08-22 | Update Notes Ability Added An Ability feature has been added to help players reach the ending more easily and experience the story. However, progress will not be saved if this ability is used. You can access this feature from the Episode screen → Mode Selection button (right side) → "Ability" button. Custom Mode Added (Unlocked after clearing Sink difficulty) A mode designed for: Players seeking a greater challenge Players who want to explore the game’s structure in more depth Improvements & Fixes Fully resolved an issue where large units could get stuck in certain spots Additional explanations have been added and improved Completely overhaul |
| V3.2.0 Patch | 2025-08-07 | Added hint box Angel Spawn Motion Changed Minor balance adjustments And so on.. Note on Game Difficulty This game is intentionally designed to be very challenging, as stated in the game's description. Although the difficulty was previously lowered based on player feedback, there are no plans for further balance changes. Thank you so much for playing and for your continued support. I truly hope you all have a wonderful life. |
| V3.1.0 Patch | 2025-08-05 | Fixed an issue where AI would stop moving in certain terrain Enhanced path_finding stability Note on Game Difficulty This game is intentionally designed to be very challenging, as stated in the game's description. Although the difficulty was previously lowered based on player feedback, there are no plans for further balance changes. Thank you so much for playing and for your continued support. I truly hope you all have a wonderful life. |
| V3.0.4 Patch | 2025-08-04 | Optimization Improved AI pathfinding performance Fix small bugs Note on Game Difficulty This game is intentionally designed to be very challenging, as stated in the game's description. Although the difficulty was previously lowered based on player feedback, there are no plans for further balance changes. Thank you so much for playing and for your continued support. I truly hope you all have a wonderful life. |
| V3.0.3 Patch | 2025-08-03 | Thank you for playing my game! |
| V.3 Release! | 2025-08-02 | Balance Adjustments #2, New Features & Optimization Details: Adjusted difficulty balance Added Achievements Added time tracking feature Spatial distortion sound sync implemented Optimization improvements Minor bug fixes And so on... Thank you for playing my game! Always stay happy :) |
| V2.2.0 Patch | 2025-07-30 | Fix Small Bugs Plus Achievement Better Performance Brighter Vision Reflects Feedback Difficulty reduced And so on... |
| V.2 Release! | 2025-07-28 | Balance Adjustments & Minor Bug Fixes Details: Increased gap between Lucid and Sink modes Buffed cigarette ability Improved item acquisition issues Enhanced hint system Reduced Heyum's vision and reworked Lucid mode ability Ara changes location after each exorcism Slight adjustments to all AI pathfinding methods Fixed minor bugs Lowered Lucid difficulty Adjusted item drop rates And so on... Thank you for playing my game! Always stay happy |
| 13% off — for 13 days. | 2025-07-26 | To you, who will always long for the 13th Month — we're still here, waiting. Event Period: ~ August 7 (13 Days)Discount: 13% OFF Share your thoughts. Your review might be the only light for those who enter UNDECEMBER next. |
| V1.1.0 | 2025-07-25 | Update for smooth game playing :) |
| Launch Incoming! Add to Your Wishlist Now! | 2025-07-18 | Add the game to your Steam wishlist today so you don’t miss out on the release, updates, and special launch content! Coming July 25!! |