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Isekai Big Two
This is an R18 card game that blends roguelike mechanics with romance simulation. You’ll embark on an adventure with four unique heroines—conquering both battles and their hearts. Mix and match card combinations freely, build the ultimate deck, and rise as the true Big Two champion!
Release Date:
Q1 2026
Developer:
Publisher:
Hippo Games
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Features
Single-player
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔
Japanese ✔ ✔ ✔
Simplified Chinese ✔ ✔
Traditional Chinese ✔ ✔
Korean ✔ ✔
This game is not yet available on Steam

Planned Release Date: Q1 2026

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Mature Content Description

The developers describe the content like this:

Warning!

- This game contains adult content, including full nudity and sexual scenes.

- All characters involved in adult content are over 20 years old.

- Themes include romance and harem elements. Please enjoy with peace of mind.

About This Game

Mysterious anomalies are appearing in the modern world. You are an ordinary young man who accidentally obtains a magical card that opens the gateway to another world, beginning a journey across time and space. In a realm filled with magic and peril, you’ll meet four heroines, each with distinct personalities. Together, you’ll uncover the truth behind the looming catastrophe— and ultimately decide who will spend the rest of their life by your side. This is a fantasy isekai adventure where romance, strategy, and poker mechanics collide. In “Isekai Big Two”, will you rise to become the true champion?

Interactive CG Events

Character Introduction

🧪 Researcher｜Irene Lewis

🧙‍♀️ Mage｜Lisel Elvy

🐶 Beastkin｜Koya

🌿 Elf｜Freya

Play Big Two in Isekai

Over 100 cards to build your unique deck and unleash unbelievable comeback combos!

Game Features

  • Fully Japanese-voiced heroines

  • Interactive CG scenes

  • Addictive Big Two + Roguelike mechanics

System Requirements

    Minimum:
    • OS: Windows 10 +
    • Processor: Core 2 +
    • Memory: 2 GB RAM
    • Graphics: HD620 +
    • DirectX: Version 9.0c
    • Storage: 2 GB available space
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