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Isekai Janken Hero

Adult Only · 18+

Isekai Janken Hero

The Goddess of this new world has armed you with the power of rock-paper-scissors and tasked you to defeat a group of monster girl Overlords. Will you finally get the monster girl harem of your dreams, or does this sound too good to be true?

Released Sep 21, 2023 Developer BFS Publisher Mango Party, Mango Party News Platforms Windows
View on Steam ↗ $5.99 (US · as of 2026-09-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

84.3%positive581 reviews
Recommended · 0 found this helpful

“Ro sham bo you for your girl. If you have the balls.”

— a player, Steam review · 2 hrs played
Not recommended · 1 found this helpful

“ok animations, but mindnumbing gameplay”

— a player, Steam review · 0 hrs played
Not recommended · 0 found this helpful

“Breasts are like large sacks of water. Nipples look like pencil erasers when you do the trick that makes 'em look curvy. Animation points totally distort the anatomy of the characters. The gameplay isn't even rock paper scissors.”

— a player, Steam review · 1 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. History through 2026-04 via SteamCharts; self-collected from the Steam API since Aug 2026.

172all-time peak
0 50 100 2024 2025 2026 No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period No data collected for this period 51 avg · Sep 2023

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

33achievements
67.7%median completion
10.1%rarest: Impenetrable
97.1% of players 92.7% of players 92.5% of players 88.8% of players 86.8% of players 80.8% of players 78.9% of players 78.1% of players 76.0% of players 75.0% of players 74.1% of players 72.7% of players 71.2% of players 70.0% of players 69.6% of players 68.5% of players 67.7% of players 66.4% of players 66.4% of players 65.7% of players 65.0% of players 60.0% of players 58.4% of players 55.7% of players 48.9% of players 35.5% of players 35.3% of players 34.8% of players 33.8% of players 20.3% of players 17.9% of players 11.5% of players 10.1% of players 97.1% 0% most earned rarest
Almost everyone has
97.1%Bashful Cattia — Cleared the 1st Cattia stage
92.7%Massive — Cleared the 2nd Cattia stage
92.5%Precise COntrol — Hit the Janken Indicator target 20 times
Rarest badges of honor
10.1%Impenetrable — Used Guard 100 times
11.5%Watch Your Health — Used Heal 100 Times
17.9%Gekka's Charm — Gekka used Rage once

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Jul 25, 2024
Taiwan Love Story⁵ - An Unforgettable Journey of Romance with Five Charming ladies!

https://clan.akamai.steamstatic.com/images/41075428/4d862846242671374e653cc464a95ab2a9b27633.gif About Game Taiwan Love Story⁵ is an interactive romance novel. While studying abroad, you attend a coha

Jul 12, 2024
NTR Office - Defend your love or choose to be cuckolded, it's all up to you!

https://clan.akamai.steamstatic.com/images/41075428/3e6cebf2d0ef4491e9d70e2a351bab4b4e5fa5c2.gif About Game You work at a poorly managed pharmaceutical company, where your girlfriend is your team lead

Jun 21, 2024
Dead-End City Blues - Infiltrates the city of sin, and defeat comes with a price!

https://clan.akamai.steamstatic.com/images/41075428/6ba067df07b2afc73333a6fb5d0d1adf64e5de48.png About Game 2080, Japan. Neo-Yokohama is a chaotic, violent hellhole. With the police nowhere to be seen

Jun 08, 2024
Countdown to an Amazing Summer: Four Blockbuster Games from Mango Party Coming Soon!

https://clan.akamai.steamstatic.com/images/41075428/e900087d0f43000012fea260117d889dbe90df7f.jpg Summer is just around the corner! Don't go out in the scorching heat, stay home with Mango Party and en

Jun 07, 2024
Latex & Tentacles - Play as the Evil Tentacle, Controlling Slaves and Corrupting the World!

https://clan.akamai.steamstatic.com/images/41075428/8ae3616618254f3861e80eccbb5196305f680df1.png About Game Latex & Tentacles is a tower management and sidescroller game. Play as the forces of evil, a

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresAdventure, Casual, RPG, Strategy
FeaturesSingle-player · Family Sharing
LanguagesEnglish, Traditional Chinese * , Japanese * , Simplified Chinese * , Korean *
Achievements33
Minimum system requirements (PC)

Minimum: OS *: Windows7/8/10 Processor: Intel Core i3 Memory: 4 GB RAM Graphics: NVIDIA GeForce GTX 560 / AMD Radeon HD 6870 DirectX 版本: 11