Discovering the hidden tunnel under the well in Brightstone Cove Tseldora only to get eaten by a mimic is one of those moments you can feel fromsofts devs laughing their asses off when designing the level

I wish they made a final chest after Elden beast that was a mimic

The best solution is to give the chest a quick stab to be sure

Noita has chest mimics. They're often reasonably easy to spot and there's no reason not to just attack a chest before you touch it

What you don't tend to find out until much later is that it also has health pickup mimics in a game where healing is very tough to come by outside of those pickups

And also sometimes you get health pickup mimics from inside non-mimic chests

Dark souls mimics have the chain pointing the opposite direction. You can always tell if you take the time. Or attack every chest.