Original Mod:
https://mods.factorio.com/mod/StopBiterCollisions

Original Mod Description:

This is a snippet of code from Klonan's mod, KS combat. You can download it here: https://mods.factorio.com/mod/KS_Combat

The reason I created this was because I wanted to create a mod that just turned off the biter collisions and nothing else for personal use. Klonan has already uploaded a mod that does this along with a variety of other things, so I figured I would upload just that bit for myself and anyone else who wants to use it. Obviously full credit goes to Klonan.

What this does in game is stop the biters from hanging at the back of the group and running into defenses one by one. It makes the game much more difficult.

This is my first mod, let me know if I messed anything up. Thanks.

Updated mod to work with Factorio 1.0

Deprecated, as it is already implemented in vanilla. Thanks to KiwiHawk for pointing it out.
See https://factorio.com/blog/post/fff-316 for more information.