Need for predictable random generator

Question

I\'m a web-game developer and I got a problem with random numbers. Let\'s say that a player has 20% chance to get a critical hit with his sword. That means, 1 out of 5 hits

Answer 1

How about weighting the value?

For example, if you have a 20% chance to critical hit, generate a number between 1 and 5 with one number representing a critical hit, or a number between 1 and 100 with 20 numbers being a critical hit.

But as long as you are working with random or pseudorandom numbers, there's no way to potentially avoid the results you are currently seeing. It's the nature of randomness.