Keep banging on the doors, they may occasionally come to you... Either survivors or zombies...

If anyone out there is still making mutations, I'm suggesting a mutation with the following rules:

1. Realism rules are turned on automatically
   
2. You spawn alone at the first stage with no teammates and no special infected
   
3. You gather new teamates as you proceed, by rescuing them from the randomly-choosen rescue rooms (1 per stage, including first stage) - also, teammates in rescue rooms MAY NOT glow.
   
4. Players are randomly assigned to be 1st, 2nd, 3rd or 4th survivor
   
5. After every fail, players are selected in this pattern:
   
   • 4th player becomes 1st survivor
     
   • 3rd player becomes 4th survivor
     
   • 2nd player becomes 3rd
     
   • 1st player becomes 2nd
6. If a teammate weren't rescued and survivors made it to the checkpoint, he will have a chance to make it to the checkpoint on his own, (survivors from checkpoint cannot help him until he's close enough to the checkpoint doors) by automatically opening/destroying doors of a rescue room. However, common infected will spawn as normal + amount of special infected set to 1, no matter the number of stage + items picked up by survivors will not respawn.
   
7. If a map has less than 4 stages, you spawn with "4 - Number of stages" teammates
   
8. Special infected spawn in the same number as all the player alive (2 players = 2 sp. infected)
   
9. Dead player will never respawn and is only revivable by defibrilator
   
10. In case of a failed stage where a new teammate has been already found, number of players would be reset to the previous number, and a rescue room will be randomized again.

This would be cool, unless it's already there and I'm a blind dumb♥♥♥♥♥..