Idle games that work offline

One of the nicest things about idle games is coming back to find that your little world has grown without you. But how does that actually work in a browser game, when you have closed the tab? And can you play without an internet connection at all? This guide explains it honestly, including what our own game does.

The honest answer: your browser is not running the game

When you close a tab, or your phone puts the browser to sleep, the game stops. Browsers do not keep web pages running in the background, and for good reason: it would drain your battery and slow down everything else.

So how do idle games reward you for time away? They do a sum when you come back.

When you leave, the game saves your progress along with the time.
When you return, it looks at how long you were gone.
It works out what your helpers would have made in that time, at the rate they were producing when you left, and adds it all at once.

The result feels as though the game kept running, but no work was being done while you were away. That is also why the “welcome back” message appears the moment you return, rather than you seeing the numbers tick up while you were gone.

Why there is usually a limit

Most idle games put a cap on offline progress, often somewhere between a few hours and a day. There are a few good reasons:

It keeps the game balanced. Without a cap, leaving a game for a month would hand you a month of earnings and skip most of the game.
It discourages clock tricks. Since the game relies on the time on your device, changing your device’s clock could otherwise give you unlimited earnings.
It gives a natural rhythm. A cap of half a day or so means checking in once in the morning and once in the evening gets you everything.

Some games also pay you less for offline time than for active play, sometimes a half or a quarter. This is called an efficiency factor, and it is there to make playing actively a little more rewarding.

What our game does

In Steep & Steam:

Your shop keeps brewing while you are away for up to 12 hours, at full speed. There is no reduced rate.
It uses the production rate you had when you left. Helpers or upgrades you could have afforded while away are not bought for you.
When you come back after more than a minute away, a short summary tells you how long you were gone and what your shop brewed.
If your device’s clock has gone backwards, you simply earn nothing for that gap. Moving the clock forwards can never earn more than the 12-hour limit.
The same happens if you switch to another tab: the game pauses to save your battery and settles up when you come back.

Can you play with no internet connection?

There are two separate questions here.

Does the game need the internet while you play? For many browser idle games, including ours, no. Steep & Steam runs entirely in your browser and saves on your device, so once the page has loaded it keeps working if your connection drops.

Can you open it with no connection at all? Usually not. Your browser has to download the page first, so you will need a connection to start a session. Some browser games add special support for fully offline play, and many phone and Steam idle games work offline completely. If true offline play matters to you, check the details for each game.

Where your progress is stored

Most browser idle games save to your browser’s own storage, on your device. That has real advantages: no account, no passwords, nothing sent to a server. It also has some limits worth knowing about:

Your save belongs to that browser. Progress on your laptop will not appear on your phone, and Chrome and Firefox on the same computer keep separate saves.
Browsers can clear it. Clearing your browsing data, using private or incognito mode, or running very low on storage can remove saved games.
Two tabs can clash. Playing the same game in two tabs at once can make one overwrite the other. Steep & Steam detects this and pauses the older tab.

Keep your progress safe

The best habit is to export a backup now and then. Most idle games offer a way to copy your save as text. On Littleby, the Save page lets you copy your save text or download it as a file, and paste it back in later, in any browser, on any device. It takes a few seconds and means you never lose a long-running game.

A quick checklist

Close the game normally rather than letting your device run out of battery mid-save.
Avoid private browsing if you want to keep your progress.
Do not play the same save in two tabs at once.
Back up your save before clearing browser data or switching devices.
Remember that offline earnings are capped, so checking in about twice a day gets you the most.

For more on how idle games are put together, read what are idle games?, or learn when to reset for a bonus in what is prestige?