Completely uses Lunzir's Non Wave Defense https://mods.factorio.com/mod/NonWaveDefense, which is itself taken from the (old) official scenario.
Kill biters and nests to get money for upgrades! (want to add settings so only nests is an option, like new 0.18.xx Wave Defense behavior).
If enemies from a mod are missing, tell me (Hardcorio comes to mind). There's some comments/thoughts in changelog.txt. Most of the patching was bug fixing, no new features.
Only works for force "player" I think. Should be able to be made compatible with more teams.