Rig any corpse with explosives and let raiders set them off for you. Trigger on contact, attack, butcher, or eat. Body size scales how much you can pack in.
Research branches add remote trigger, rot suppression, proximity trigger, high tier payloads up to antigrain, and directional cone blasts that focus the whole explosion into a wedge.
With Anomaly, push it further into walking mines that chase enemies down, plus stacking buffs that make walkers tankier, faster, and harder hitting.
Research Corpse Bomb Rigging > Right-click a corpse with a crafting of 4+ colonist selected > "Rig corpse bomb..." > choose a payload.
The colonist hauls explosives and rigs the corpse, which then triggers from damage, desiccation, butchering, ingestion, or enemies stepping nearby. Further research unlocks remote detonation, proximity triggers, heavy ordnance, directional blasts, and (with Anomaly) walking corpse mines.
The basic corpse bombs(non-walkers) runs fine without Anomaly.
-R&D