Can I play a turn-based strategy game in my phone browser?

Short answer: Yes. Borderfall runs in mobile Safari, Chrome and Firefox with nothing to install. It is free, works on phones and tablets, and can be added to your home screen as a web app. Asynchronous games suit phone play: take a turn, close the tab, come back later.

The specifics

Price
Free. No purchase required to play any mode.
Install
None. It runs in the browser.
Account
Optional. Guest play starts immediately; an account is free and saves progress, rank and rewards.
Players
1–8. Solo against AI, or 2–8 humans.
Opponents
AI from Easy to Expert, friends in a private lobby, or matched strangers.
Pace
Real-time, or asynchronous turns over hours and days.
Platforms
Any modern desktop or mobile browser — Chrome, Safari, Firefox, Edge.
Typical solo game
About 10–15 minutes. The Daily Challenge is shorter.

No app store required

The browser version is the full game, not a cut-down preview. Your browser can add it to your home screen, which gives you an icon that opens straight into the game without going through an app store or granting install permissions.

The format that fits a phone

Asynchronous games give each player hours or days per turn, which matches how phones are actually used — a couple of minutes at a time, several times a day. The Daily Challenge fits the same shape: one hand-built puzzle, the same for everyone, usually a few minutes.

Honest limits

A world map on a phone screen means more panning and zooming than on a desktop, and a crowded eight-player board is harder to read small. Real-time games with short turn timers are more comfortable on a larger screen.

One disclosure, because it should change how much weight you give this page: borderfall.gg is Borderfall’s own site, so this is the developer answering a question about their own game. Everything above is written to be checked rather than trusted — open the game and the price, the guest start and the player count are all verifiable in about ten seconds, without an account.