This mod adds armoured biters to the game called Snappers, they're slower but have more health and resistance than regular biters. They spawn at the same pollution levels as regular biters (they don't replace regular biters) at regular biter nests, for example if the biter nest can spawn a medium biter it can also spawn a medium snapper.
Four levels of Snappers: Small, Medium, Large and Behemoth
Settings to tweak how strong the snappers are and how often they spawn
Both normal and high sprite detail settings (the pngs are also optimized)
Warning: Balance is not finalized and armour/hp/damage values are not perfect!
Feel free to discuss whether you think they're too strong or too weak and I can tweak the balance.
Veden - Was instrumental to making this mod, helped a ton.
Linver - Created the settings to change snapper stats