jsfehler

The commandment isn't "Thou shalt not kill", it's "Thou shalt not murder". The KJV bible was mistranslated when compared to the original Hebrew. Killing the enemy in war isn't murder and Frank, well Frank has always been at war, hasn't he?

They're not brothers or business partners but they share the same values and hobbies. They enjoy each other's company and value their time together. They're best friends. Super best friends, one might say.

I'm going to assume you mean something like:

python:
    result = renpy.input("Player Select")
    if result == '0':
        renpy.jump('ev_0')
    elif result == '1':
        renpy.jump('ev_1')

This is less of a Ren'Py question and more of a programming question. In terms of easier to maintain code, you want to split the setup of your data from the execution of your logic. For example:

python:
    result = renpy.input("Player Select")
    ev_name: str = ''    
    
    if result == '0':
        ev_name = 'ev_0'
    elif result == '1':
        ev_name = 'ev_1'

    renpy.jump(ev_name)

This is going to make maintenance easier and changes less likely to explode. Debugging will be easier because you have less places for the logic to be incorrect. However, this doesn't get you out of writing if/else statements.

Instead of thinking of "how can I avoid an if/else statement?", think "how can I implement the best selection mechanism for my problem?"

You could use a list:

python:
    my_list = ['ev_0', 'ev_1', 'ev_2']
    result = renpy.input("Player Select")
    result = int(result)
    choice = my_list[result]
    renpy.jump(choice)

You could also use a dictionary:

python:
   my_dict = {
       'orange': 'ev_0',
       'banana': 'ev_1',
       'grape': 'ev_2',
   }
   result = renpy.input("Player Select")
   choice = my_dict[result]
   renpy.jump(choice)

You could create a class:

python:
    class FruitBasket:
        orange = 0
        banana = 1
        grape = 2

        def __init__(self):
            self.taken = []

        def take(self, fruit_name: str):
            if fruit_name not in self.taken:
                result = getattr(self, fruit_name)
                self.taken.append(fruit_name)
                return result

It all depends on what you need to do.

Fallout Japan already exists. It's called Shin Megami Tensei.