unlimited time

If your talking about infintie mode you have to get the true ending wich unlocks overtime then beat overtime and you get infinty mode

There is an Infinite Mode, but it isn't just walking around. To get it, you must finish 72-Hour mode with an A rank to unlock Overtime Mode. Then, beat Overtime mode and you'll be rewarded with Infinity Mode.

Now, Infinity Mode is radically different than 72-Hour mode:

- ALL characters are hostile. This ranges from Otis to Adam the Clown. They'll all appear at different intervals in certain places throughout the days, but they're all hostile, and they drop useful items on death.
- Your health slowly drains (1 block every 100 seconds)
- The Supermarket is Closed
- Infinite food spawning sources are turned off.
- Certain items appear in different places than they did in 72-Hour Mode
- You cannot save.
- You do not earn PP until Frank dies and you're given stats.

You can use this mode to get the 5-Day and 7-Day survivor achievements, which unlock some goodies, although you'll need to be fast on your feet and smart with your food to get them!