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★ —/ 5.0
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Steam SentimentView on Steam
MetacriticTBD
Tune the two older women he lives with as humiliation gives way to a sweet, dangerous reversal.
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Multiplayer & Platform Capabilities
SINGLEPLAYER
✓ Supported
ONLINE CO-OP / PVP
Solo Only
LOCAL SPLIT-SCREEN
Unsupported
CONTROLLER / CROSSPLAY
Keyboard & Mouse
Gameplay Duration & Completion
Crowdsourced campaign length, extra objectives, and 100% completion metrics
Gameplay Format & DurationMultiplayer & Social
Session-Based / Party Multiplayer
Designed for dynamic rounds, party matchmaking, and infinite multiplayer replayability. No fixed linear campaign duration.
4K Screenshots & Media Gallery
Official high-resolution media gallery (6 screenshots)
Trailer
sample-movieWatch on Steam
View in 4K Lightbox
View in 4K Lightbox
System Requirements & Steam Deck
Steam Deck: UNKNOWN
- Controller configuration recommended
- Native display resolution supported
Minimum Specifications
OS: Windows 11
Processor (CPU): 1+ GHz processor
Memory (RAM): 1024 MB RAM
Graphics (GPU): VRAM 128MB以上
Storage: 1600 MB available space
Recommended Specifications (60 FPS Ultra)
OS: Windows 11
Processor (CPU): 2+ GHz processor
Memory (RAM): 2048 MB RAM
Graphics (GPU): VRAM 256MB以上
Storage: 1800 MB available space
Editions & Add-On Content (DLC)
Available game editions, collector bundles, Supporter Packs, and downloadable expansions
Base Edition
Gal Big Sister Z — Standard Edition
$19.99
- Full Base Game
DLCs, Expansions & Supporter Packs (2)
Gal Big Sister Z：Extra Contents for Kanako
$31.85
Official DLC • Released Aug 27, 2026
Aug 27, 2026
Gal Big Sister Z：Extra Contents for Rena
$31.85
Official DLC • Released Aug 27, 2026
Aug 27, 2026
Official Store Prices & Subscriptions
Live pricing across official digital stores, historical lows, and subscription catalog availability
Current Best Offer
$19.99STEAM
Regular Retail (MSRP)
$19.99USD
Verified All-Time LowBest Time to Buy
$19.99
STEAM
$19.99
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Community Q&A Forum
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Creators & Development Team
Key directors, leads, and game development studios