I don't think you can change the spawn rate for when exploring the map in an existing game, and even if you could, it wouldn't change already generated areas, especially the smaller starting area which you have already now built up.=
You can boost the evolution to get medium/big/behemoth spawns sooner.
In the chat/console:
"/evolution" will give you can idea of what your current evolution level is, for reference see
https://wiki.factorio.com/Enemies#Evolution . roughly at 0.2 medium biters show up, at 0.6 big and 0.9 behemoth.
"/c game.forces["enemy"].evolution_factor=0.5" can set it directly immediately, in this case to 0.5.
Or change the automatic progression by changing these (death world values in example), as well as pollution to get the
larger attacks.
Code: Select all
/c game.map_settings.pollution.ageing=0.5
/c game.map_settings.pollution.enemy_attack_pollution_consumption_modifier=0.5
/c game.map_settings.enemy_evolution.time_factor=0.00002
/c game.map_settings.enemy_evolution.destroy_factor=200
/c game.map_settings.enemy_evolution.pollution_factor=0.0000012
/c
(see the data/base/prototypes/map-settings.lua text file in your games installation for some other options, they correspond to the new game sliders).
You can also boost how fast they build bases (the "Enemy expansion" settings on a new game), although the death world preset
does not do this, see the "enemy_expansion" items for the options there.