The Sin Within

by CigarRex

Uncensored Windows Linux Mac
Versionv0.5.2
EngineRen'Py
Released2026-09-08
Updated2026-09-08
LanguageEnglish

About The Sin Within

The Sin Within is an adult Ren'Py adventure and dating sim by CigarRex, presented with 3D CG images and animated scenes. You play Nick Harada, a suburban student whose ordinary life is changed when he becomes tied to Lust and the supernatural. As he learns to live as a devil, he explores his desires, seeks out the remaining deadly sins, and works to corrupt the women around him.

Development is ongoing, and the current build is v0.5.2, released September 8, 2026 for Windows, Linux, and Mac. It is English and uncensored. This update adds Gardening Duty II, thousands of new renders and animations, much new dialogue, and many new scenes. It expands relationships with Chell and Carol, gives more material for Rose, Claire, Beatrice, Zoey, and Karin, and introduces the Callahan Household and Carol's home. It also adds park content, special Greed dialogue, a Katherine Gyaru Frenzy featurette, a major July 4 scene, plus bug fixes and progression corrections.

Developer's description

THE SIN WITHIN is the story of a boy exploring his mundane world under a new light... Join Nick Harada , the kind student from the suburbs, in his journey to uncover the true pleasures of Lust, being led by an unlikely fate with the supernatural! Free the desires of ALL the women he knows, and the world will become a better place! (maybe?) Spoiler Posessed by the Deadly Sin of Lust , Nick will have to find his footing as a Devil, navigating through his new 'options' while he searches for the other 6 Deadly Sins! (He will have sex, if you didn't catch it!!!!!)

Download The Sin Within v0.5.2

Changelog

v0.5.2 (2026-09-08): Gardening Duty II ! Gardening Duty + 3.000 new renders (with +365 animations!! ) + 5.000 lines of dialogue! + 32 NEW SCENES!! + FURTHER YOUR RELATIONSHIPS WITH CHELL AND CAROL! + Some more scenes with Rose, Claire, Beatrice, Zoey and Karin...! + 2 New Locations: Callahan Household; Carol's Home (Or, Bedroom...) ! + Finally added stuff to The Park! + Added special dialogue with Greed regarding your recent discoveries... Don't miss it. + 2 NEW EXTRAS: - A small featurette with Katherine in the Gyaru Frenzy storyline! - THE MOST GARGANTUAN, OBSCENE AND INCREDIBLE SCENE IN THE GAME: THE 4TH OF JULY SPECIAL! WITH OVER 800 RENDERS BY ITSELF!! + Fixed lots of bugs!! + Fixed some progression oversights and missing pieces. + Fixed some typos, but definitely not all Please keep the reports coming! Totalling... ~ 23.000 renders ~ 51.000 lines of dialogue ~ 1.500 animations v0.5.1 (2026-04-08): Gardening Duty I ! Gardening Duty + 2.270 new renders (with +282 animations!! ) + 4.000 lines of dialogue! + 23 NEW, INCREDIBLY SPICY SCENES!! + BRING MS. CLAIRE TO LUST LVL 2 - THE FIRST OF MANY! + Invite many other girls to your questionable photoshoot sessions at School... + 1 New Location: Ms. Claire's Apartment! + 1 New Location: The Park! (but there's nothing there yet... Soon TM) + Overhauled the Notes App : Now features an extensive Quest tab, guiding you through whatever storylines require a bit more attention step-by-step. + Overhauled the Gallery App : Each Gallery section now features a progress bar and a scene counter. + Overhauled the Help App : Now contains several topics neatly organized to help you out. I told you, it would get prettier one day! + Added Keybinds! Check the Help App for the full list. These will make your life much easier! + Fixed some eldritch bugs and embarrassing typos. Totalling... ~ 20.000 renders ~ 46.000 lines of dialogue v0.5.0 (2025-08-08): Back to School! Brick-By-Brick + 3.375 new renders (with +142 animations!! ) + 8.000 lines of dialogue! + 74 NEW SCENES!! (plus countless other smaller interactions...) + 3 new characters! (Katherine, Beth, Nico) + 1 new SUPER-LOCATION The School! The School is divided into 6 new locations, 30 rooms total! + 11 brand-new events! + Implemented the Favor System Warm yourself up to hard-headed girls first! + Implemented the Instance System Allows for characters to be in different locations depending on your current Instance. + Added checkmarks to all interactions in-game , indicating the scene's completion status. + Added checkmarks to indicate if a scene skips time. + Added a button to skip the time in the Contacts App. + Added a short questline that unlocks Teleporting to characters from the Contacts App. + Fixed some eldritch bugs Totalling... ~ 18.500 renders ~ 42.000 lines of dialogue v0.4.5 (2025-01-09): THE RESORT EPISODE The Family Circle: Part II + 4.425 new renders (with +158 animations!! ) + 9.000 lines of dialogue! + 44 new scenes! (5 EXTRA SCENES, 12 SURPRISE SCENES...!) + 5 new characters! (4 being subscriber requests!) (Lotte, Akari, Gwen, Cordelia Rivas, Sera!) + 1 new location (The Sunset Resort!) + 1 major event: Bring your family to the Resort! + Added a search bar to the Contacts App! + Added minor characters to a new section of the Contacts App! + Added a system to locate each character in-game from the Contacts App! + You can now see who's in a location from the Map! + You can now preview who's in a room when there are multiple characters around. + You can now see when an event is taking place somewhere from the Map. + Prepared some systems to be implemented in the next update - 0.5.0! Totalling... ~ 15.000 renders ~ 34.000 lines of dialogue v0.4 (2024-03-15): TREASURES & MAPS + 3.300 new renders (with +272 animations!! ) + 500 new sprites! + 7.800 lines of dialogue! + ~50 new scenes! + added map system + 3 new locations (LoveZone, Mall, Coffee Shop) + 2 new characters (Tina and ??? ) + Reach LVL 100 with Chloe, Karla, Michelle, Alice and Tina ! + improved audio system + reworked notifications & improved UI + 2 new ways of making money! + and a secret way of becoming a millionaire... Totalling... ~ 10.500 renders ~ 25.000 lines of dialogue PLUS: + 3 Extra Scenes, requested by subs! v0.3 (2023-07-20): THE FAMILY CIRCLE - PART 1 + 2.300 new renders (with +200 animations) + 540 new sprites + 6.200 lines of dialogue + ~40 new scenes Totalling... ~ 7.200 renders ~ 17.200 lines of dialogue PLUS: + 2 Extra Scenes , requested by subs! You can access these by doing Greed's little quest. Don't forget to be very diligent! v0.2.1 (2023-04-15): SECOND HALF OF THE PROLOGUE! +2.700 images & animations +6.150 lines of dialogue +14 kinetic scenes Totalling... 4.900 images & animations!! 11.000 lines of dialogue!! PLUS: + Early Preview for the SANDBOX + Added Replay Gallery (GALLERY) + Added Character Details (CONTACTS) + Added Event Tracker (MY NOTES) + Added 'Unlock Gallery Entries' Cheat (SPECIALS) PLUS!! + Everything added in the previous hot-fix (0.1.1) v0.1.1 (2023-04-08): Hot-fix addressing a few things: + Added a slider in the settings that lets you control the intensity of Screen Shakes + Added the option to skip certain scenes + Rewrote a few segments to better contextualize character's motives + Replaced nearly every song, sound effect and font used in the game (I had to) + Included subscribers (as of April 8th) in the credits section. v0.1 (2023-04-01): Release of the game - FIRST HALF OF THE PROLOGUE! +2.200 images & animations +5.500 lines of dialogue +18 NEW kinetic scenes

Player reviews

Player rating 4.5 / 5 · 20 ratings
Written reviews 20 · avg 4.1★
Positive (4–5★) 70%
Latest review 2026-02-26

What players say

Most players rate it highly, praising variety and visuals, while some criticize pacing, slow burn, and unfinished sandbox content.

5★ 10
4★ 4
3★ 4
2★ 1
1★ 1

Players like

  • Diverse characters and kinks
  • Strong visuals and animations
  • Interesting premise and writing
  • Memorable scenes and compelling characters

Common complaints

  • Slow pacing and long prologue
  • Few explicit scenes or limited progression
  • Repetitive dialogue and text-heavy play

Best for players who enjoy varied kinks, strong visuals, and dark supernatural adult stories.

Summarised from 20 written player reviews.

-lust- 2026-02-26 ★★★★★
Diversity of characters 'n kinks. This is a top tier HS game that doesn't take itself too seriously, it's fun, engaging and has memorable scenes even if, sometimes, the most memorable ones aren't canon Highly recommend giving this a shot…
The Lamb Sauce 2026-01-20 ★★★★★
I have to say this shit is peak like JJK of porn game. The content of the game itself is nothing special too special but the scenes: the context, writings, and renders of them are so hot and is exemplary…
hairy_trump 2025-11-17 ★★★★★
I giving it four stars is because the purple guy scenes go hard, but the main guy remains in his base body he is dumb, writing is frustrating and meandering . The movment scene is janky . Overall I will…

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