# Undermine: Four in a Row — Hidden mines. Two players.

> Hidden mines. Two players. (iPhone/iPad app by Sui Pan WAN.)

- Source: https://appshunter.io/ios/app/undermine-four-in-a-row/id6817616913 (this page in markdown: same URL + `.md`)
- Developer: [Sui Pan WAN](https://appshunter.io/developer/6817616915)
- Category: Games, Board, Strategy
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English, Korean, Chinese (Traditional, Taiwan)
- Released: 2026-10-12
- Data updated: 2026-10-29

## What is Undermine?

Undermine is a tense two-player board game for one iPhone or iPad lying on the table between you.

Take turns placing chips on your own entry row or moving any chip on the board — yours or your opponent's — one step in any direction. Be the first to line up four of your colour, across, down or diagonally.

But 18 mines are hidden under the 6 × 6 board, three in every row, and nobody knows where. Whenever a chip steps on a mine, it flips to the other colour. Push your opponent's chip onto a mine and it becomes yours — or complete their line by accident and hand them the win.

• Two players face to face on one device, or VS Bot at Easy, Normal and Hard
• Tabletop layout: each player reads their own end of the screen
• Learn in a minute with illustrated How to Play cards and in-game tips
• Undo a move by watching a short ad
• Your game is saved automatically — continue any time
• View the mines when the game ends and see where it turned
• Free with ads; a one-time Remove Ads purchase turns them off
• English, Traditional Chinese and Korean

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Is Undermine safe?

Not enough ratings yet to assess Undermine.

## Is Undermine legit?

Undermine: Four in a Row has limited verification signals. The AppsHunter Legitimacy Score for Undermine is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.2.0 — 2026-10-18

• Rule tips for new players
• Movable chips glow on your turn
• Fewer ads between matches

### 1.1.0 — 2026-10-15

Korean is now supported: play and learn the rules in Korean.

### 1.0.1 — 2026-10-14

Minor improvements.

### 1.0 — 2026-10-12

No release notes.

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## Related topics

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-29.*