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19 Sep 2026
| Published | Title | Build |
|---|---|---|
| Version 1.5.3 Fixed an issue with Steam Achievements that was caused by the game engine update · Fixed an UI element on Steam Deck | 23145609 | |
| Version 1.5.2 Updated the game engine for better compatibility with modern operating systems · Introduced a number of fixes and improvements to the assistive self-voicing feature for the visually impaired If you have any issues with the new version of the game, the previous version is available in the "Game Versions & Betas" section of the "Properties" menu. By the way, the next Arcus Plume game will be anno… | 23043136 | |
| Version 1.5.1 A small post-final (?) update that fixes a bunch of typos and grammatical errors in the final content update. ːunit_of_manaː | — | |
| Version 1.5.0: The Grand Finalemajor The Serena's Services story arc ends with a bang! ːstar_of_masteryː ( Disclaimer: no explosions included. ) This content update isn't called The Grand Finale for no reason. It's not only the final update but also easily the biggest one. With a word count of over 11000 words, it's approximately as big as the two previous updates combined! Of course, there's plenty of new art as well! The mysteri… | — | |
| Version 1.4.0: An Old Friendmajor Sometimes, a chance encounter with an old friend may open up new possibilities. What lies in store for Serena and Nerisha? Only time will tell... It's the first anniversary of the release of Succubus Research Diary, and here's a little something to celebrate it: the fourth content update ! This update adds two more episodes to the "Serena's Services" story arc and introduces two new characters… | — | |
| Version 1.3.1 This is a small update that corrects a couple of dozen grammatical errors and typos. ːunit_of_manaː | — | |
| Version 1.3.0: Nerisha's Servicesmajor It's Nerisha's turn to be the protagonist! The story so far has been told almost exclusively from Serena's point of view. But not this time! It's time for the cute succubus Nerisha to bask in the spotlight! Oh, and she will also meet Jenny for the first time. And not only meet her... ːheart_of_succubusː Nerisha's Services is essentially a sequel to Serena's Services (added in version 1.2.0). To… | — | |
| Version 1.2.0: Serena's Servicesmajor The second content update is here! Serena's Services expands the story in a new direction as well as introduces a new character, Jenny , to the game. What does Serena do to make the big bucks and what does it have to do with Jenny? It's time to find out! New and shiny things: · New character, background, and event art · New 5000 word story about Serena's business with Jenny · New achievements H… | — | |
| Version 1.1.0: Little Epiloguesmajor This is a content update that adds epilogues to the game: one for each ending. Find out what Serena and Nerisha are up to shortly after the endings! This update adds the following: · More content: approx. 5000 words and 3 event CGs (+23 variants) · 2 new achievements · New functionality in the 'Sex Scenes' gallery: shortcuts to endings and epilogues There are two ways to access the new content:… | — |
| Date | Day | Time | Patch title | Build ID | Branch | Depots | Download Δ |
|---|---|---|---|---|---|---|---|
| 8 May 2026 | Fri | 11:58 | Version 1.5.3 | 23145609 | public | 1 | — |
| 8 Dec 2022 | Thu | 17:31 | No patch notes · unannounced build | 10107626 | version151 | 1 | — |