Survivor 3 is a time mission in Respawnables that sends the player to stay alive for 90 seconds (or 1 minute and 30 seconds), meaning that you are not allowed to die in these 90 seconds, dying once will cause the timer to reset and you must start all over again.
"Stay alive for 90 seconds"
- The easiest way to complete this challenge is to climb the stairs in Sandtown/Spookytown, and camp with a good view of the stairs. As long as you don't shoot, no enemies should follow. In case one does, you can either shoot them before they have the chance to harm you, or jump off the side of the building to avoid death.
- Use Stealth to avoid getting detected.