You can find these popular options directly on the under the "Custom Game Mode" or "Tuning Pack" categories. 1. 250 / 500 / Unlimited PopCap Tuning Packs
If you don't want to install extra files, you can use the game's built-in developer console:
Do you need help fixing in large mods?
: Increasing or removing the population cap can affect game balance and stability. Players may encounter performance issues or find that certain strategies become overpowered.