If you prefer not to use mods, you can increase your efficiency and unit count through official gameplay mechanics:
The "Unlimited Units" mod is a community-created modification designed to "bring the emergency to a new level" by removing the standard dispatch caps. emergency 20 unlimited units full
: Use cards like the +1 Doc in Ambulance to free up dispatch slots. At max level, this removes efficiency penalties and allows you to handle more tasks with fewer vehicles. If you prefer not to use mods, you
To get the full "Emergency 20 unlimited units" experience, you need to use the game's built-in launcher. emergency 20 unlimited units full