Screenshots
Watch trailer on Steam ↗My Best Friend's Sister
Naughty Sister · Published by Naughty Sister
Content notice: The game contains explicit adult content, including erotic scenes, full nudity, and depictions of sexual acts.
Mixed — 68% positive (415 reviews) · 12 achievements
Last updated 28 Sept 2026
A night at your best friend’s house turns into a tempting choice between desire and restraint.
£4.94
£10.99Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Adventure, RPG, Simulation, Casual · 2026 · More under £5 games
Explore a night at your best friend’s house where every decision leads to new adventures. Will you follow your heart or maintain self-control in this unique RPG?
About this game
What happens when a spark ignites where it absolutely shouldn't? My Best Friend's Sister is a sizzling visual novel that pulls you into a whirlwind of temptation, secret desires, and choices that will echo through your life.
It all starts with a typical night out—you, your best friend, and his rowdy crew, drowning in drinks and sharing raunchy stories that would make anyone blush. But the real story begins after the last call. Crashing at your friend's place for the night, you come face-to-face with the one person who won't let you sleep: his younger sister.
She's sharp, playful, and impossibly alluring. And tonight, her gaze is full of unspoken promises, her words laced with a daring invitation. She's clearly playing a game, and you're her intended target.
The Choice is Yours:
Give in to Temptation? Engage in her dangerous flirtation and risk a night of passion that could shatter your most important friendship.
Take the High Road? Stay loyal to your friend and try to forget this charged encounter, always wondering "what if..."
Every decision you make shapes your relationships, unlocking new scenes, dialogue, and endings. Will you resist? Or will you let desire take control?
Key Features:
🔥 A Compelling Story with Spicy Twists
Dive into a narrative where every night holds new secrets, and every choice leads to unexpected consequences. A simple sleepover turns into a high-stakes game of seduction and loyalty.
🎨 Stunning, High-Quality Artwork
Immerse yourself in a beautifully crafted world. Featuring exquisitely illustrated characters and scenes, every location—from the noisy bar to the intimate bedroom—is rendered with stunning detail to pull you into the story.
💘 Smooth, Animated Intimate Scenes
Experience the heat of the moment with fluid and immersive adult animations that bring the passion and intensity of the story to life.
🍻 Guy's Night Out & Raunchy Bar Tales
Become one of the guys as you listen to their provocative and uncensored stories of romantic escapades and misadventures. These tales aren't just for laughs—they might even teach you a thing or two.
✨ Meaningful Choice-Driven Gameplay
This isn't about simple right or wrong answers. Your seemingly small decisions dynamically alter your relationships and directly lead to multiple endings. Replay to discover every possible outcome!
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel Core 2 Duo E4700
- Memory: 8 GB RAM
- Graphics: Intel HD 4000
- Storage: 1 GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
AnnouncementsOfficial
My Best Friend's Sister is updated. V1.4
Yeah, we know you've been busy.Sneaking around. Making bad decisions. Staring at that one notification wondering if you should click it.We don't judge. We enable.The latest update for My Best Friend's Sister just dropped, and we cleaned up all the shit that was getting in the way of your fun.Here's what got tighter:Killed off the bugs that killed the moodSmoothed out the animations—you know which onesMade those choices hit even harder (like you needed more temptation)Optimized everything so the only thing loading is… well, you get itNo more glitches. No more awkward pauses. Just you, that house, and a secret that's way too hot to keep.So go on. Open the door. See what happens when nobody's watching.My Best Friend's Sister is updated. Go be bad.Read full article on Community Announcements (Nimos Games)AnnouncementsOfficial
My Best Friend's Sister is updated.
Yeah, we know you've been busy.Sneaking around. Making bad decisions. Staring at that one notification wondering if you should click it.We don't judge. We enable.The latest update for My Best Friend's Sister just dropped, and we cleaned up all the shit that was getting in the way of your fun.Here's what got tighter:Killed off the bugs that killed the moodSmoothed out the animations—you know which onesMade those choices hit even harder (like you needed more temptation)Optimized everything so the only thing loading is… well, you get itNo more glitches. No more awkward pauses. Just you, that house, and a secret that's way too hot to keep.So go on. Open the door. See what happens when nobody's watching.My Best Friend's Sister is updated. Go be bad.Read full article on Community Announcements (Nimos Games)AnnouncementsOfficial
My Best Friend's Sister is updated. Go be bad.
Yeah, we know you've been busy.Sneaking around. Making bad decisions. Staring at that one notification wondering if you should click it.We don't judge. We enable.The latest update for My Best Friend's Sister just dropped, and we cleaned up all the shit that was getting in the way of your fun.Here's what got tighter:Killed off the bugs that killed the moodSmoothed out the animations—you know which onesMade those choices hit even harder (like you needed more temptation)Optimized everything so the only thing loading is… well, you get itNo more glitches. No more awkward pauses. Just you, that house, and a secret that's way too hot to keep.So go on. Open the door. See what happens when nobody's watching.My Best Friend's Sister is updated. Go be bad.Read full article on Community Announcements (Nimos Games)Patch NotesOfficial
Collectible Card Update: New Badges and Profile Backgrounds!
Great news for all My Best Friend's Sister fans! We've just launched an exciting update that introduces collectible trading cards, shiny new badges, and exclusive profile backgrounds. Dive deeper into your sex journey by unlocking these unique rewards and showcasing them on your Steam profile. Complete your set to unlock special avatars and display your passion for My Best Friend's Sister in style. Ready to start collecting and show off your achievements? The adventure awaits—get started today!Read full article on Community Announcements (Nimos Games)AnnouncementsOfficial
My Best Friend's Sister is out now.
Dive into a story where loyalty is tested, desire simmers just beneath the surface, and the line between right and wrong blurs with every decision.Your next move changes everything. Are you ready to see how it ends?Play My Best Friend's Sister Now.Read full article on Community Announcements (Nimos Games)
