Survival Mode!

Description:
Biters only attack at night, regardless of pollution levels, and come in waves. Survive for as many rounds as you can!

Features
Each Round has more biters spawn
They have a chance to drop ammo so be sure to pick it up. Ammo becomes more important later on
There is a difficulty settings under Options. Choose beginner if it is your first time to play.
Works in multiplayer. Each additional players adds to the number of biters that spawn
Higher levels have bigger biters so make sure you have your turrets ready
There are no biters anywhere in the game during the day time
Biters head directly for the player, not your pollution

Updates:
0.2.1 - Fix for Factorio 15.16 update
0.2.0 - Game speed bug fix.
0.1.9 - Added difficulty setting in Mod Settings. Default is Normal, which is the same as the previous versions.
0.1.8 - Added support to work properly with Factorissimo
0.1.7 - Fixed bug that caused saving games not to work properly.
0.1.6 - Support for Factorio .15. Also added some special drops from biters.
0.1.5 - GUI to show round and enemies alive counter.
0.1.4 - Biters now come from all directions