Screenshots
Watch trailer on Steam ↗Mast Up! Seas of Desire
Kopon Games · Published by Kopon Games
Content notice: Sexual representation between a human and mystical women such as Dwarf, Kitsune, Oni, Mermaid and Elf. No use of drugs, alcohol, self-harm and no sexual aggression.
4 user reviews — 75% positive (4 reviews) · 41 achievements
Last updated 27 Sept 2026
Set sail on a lewd and adventurous journey with MastUp! Seas of Desire! This hentai nautical game blends strategic navigation, romance, and mythological waifus in a high-seas quest full of passion and peril to find Cipangu.
£0.84
£1.69Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Indie, Strategy, Casual · 2025 · More under £5 games
Embark on a lewd and thrilling journey as you navigate the high seas, seeking Cipangu with Mast Up! Seas of Desire. This casual strategy game by Kopon Games combines strategic elements with passionate encounters featuring mythical waifus.
About this game
Set Sail on a Unique Puzzle Adventure!
Step into the boots of a fearless pirate captain in Mast Up! and embark on an epic journey across a world teeming with mysterious islands and magical seas. Along your journey, you’ll meet captivating girls from legends and myths, each one waiting to test your skills and steal your heart. It’s time to navigate the world’s most dangerous waters and win the ultimate treasure: Love!
Features
40 unique levels.
70+ sensual images.
100 pages of dialog.
Cozy soundtrack.
Engaging story with legendary girls.
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10
- Processor: Core I3
- Memory: 4 GB RAM
- Graphics: Graphics card supporting DirectX 9.0c
- DirectX: Version 9.0
- Storage: 1 GB available space
- Sound Card: Any
Recommended
- OS: Windows 10
- Processor: Core I5
- Memory: 8 GB RAM
- Graphics: Graphics card supporting DirectX 9.0c
- DirectX: Version 9.0
- Storage: 1 GB available space
- Sound Card: Any
Supported Languages
Latest news
AnnouncementsOfficial
Where’s My Hentai Deck & Where’s My Bara Deck – Now Available!
We’re excited to announce that Where’s My Hentai Deck and Where’s My Bara Deck are officially released! https://clan.cloudflare.steamstatic.com/images/45453949/2a6e474e1ff13c2509674e02bcbf90faa7fc01d9.jpg Where’s My Hentai Deck A straight-themed hidden object game where you search for your lost hentai deck scattered around the house. https://store.steampowered.com/app/3515540/Wheres_my_Hentai_Deck https://clan.cloudflare.steamstatic.com/images/45453949/29c4495e7dd6fc42ae5e43a2edebf110868164bf.jpg Where’s My Bara Deck A bara-themed version where you must find your bara deck, hidden in various spots. https://store.steampowered.com/app/3520290/Wheres_my_Bara_Deck Both games offer a fun and spicy hidden object experience! We also want to sincerely apologize for forgetting to apply the initial launch discount for Where’s My Bara Deck. This was an oversight on our part, and we appreciate your understanding. Thank you for your support! We hope you enjoy the games!Read full article on Community Announcements (KoponGames)AnnouncementsOfficial
Announcement: Where's My Hentai Deck?
{STEAM_CLAN_IMAGE}/45258683/dca8c98b84b239f84b457ab8ecd095ee5557b6a5.png https://shared.cloudflare.steamstatic.com/store_item_assets/steam/apps/3515540/extras/Wheres-My-Hentai-Deck.gif?t=1740166819 You've spent years collecting the rarest and most precious hentai cards… but now they’re gone! Someone scattered your beloved deck all over the house, and it’s up to you to find them all. Explore 3D environments and uncover hidden cards in the most unexpected places. Look under beds, behind furniture, and inside suspicious spots – they could be anywhere! Unlock spicy artwork and complete your lost deck as you recover each card. Get ready for a fun, naughty, and surprising scavenger hunt! Can you reclaim your entire deck? https://store.steampowered.com/app/3515540/Wheres_my_Hentai_Deck/?beta=0Read full article on Community Announcements (KoponGames)
