This mod activates peaceful mode on start which makes enemies friendly to you. They will only attack once the timer has reached zero or if you get too close to them. However, enemies will still be affected by and evolve from pollution.

Features:
6-digit timer on top left corner showing time left until end of peaceful mode (time is set in options).
Flashing timer/warning sound before timer hits zero (time is set in options).
Option for allowing hostile action during truce.
Works on saved games (as long as the playtime doesn't exceed the set timer)

This mod is great for players who wants to play on hard difficulty level with time to prepare themselves before getting attacked. Or simply, for someone who wants a challenge and see if they have the required skills to build a defense quick enough before the time runs out and the enemy destroys them.

Don't hesitate to give me your feedback on existing features or new features/improvements!