Emergency 20 Unlimited Units [portable] Full | Limited Time |

While this doesn't technically give you "infinite" slots in the traditional UI, it allows you to spawn whatever you need, whenever you need it, provided you have the budget.

But sometimes, you just want to roleplay a massive disaster response operation. You want a convoy of 20 fire trucks. You want an army of paramedics. emergency 20 unlimited units full

The response was immediate.