Radical Rat

Radical Rat is one of the two Act 1 final bosses of The Alley, serving as the primary gate to The Sewers and The Junkyard. With 67 HP, he is a giant rat wearing sunglasses who fights exclusively through explosive ordnance rather than direct attacks. His arena can appear deceptively simple at first, but the bomb mechanics demand constant repositioning and quick prioritization from your team. Defeating Radical Rat or Queen Hippo is required to advance past Chapter 1.

On his bonus turns, Radical Rat tosses Rat Bombs near your cats, with a maximum of two active bombs on the field at once. Each bomb has only 1 HP and detonates in a cross pattern with a 10-tile range at the end of the round, dealing heavy damage to anything caught in the blast. The bomb placement AI prioritizes clusters of two or more cats, so keeping your formation spread is critical. After his bombing phase, Radical Rat hides inside a trash can and becomes fully invulnerable with knockback on exit. During rain, his behavior changes significantly: bombs target cats directly for 5 damage with a stun chance, spawning defused bombs on impact. Water tiles can also instantly defuse active bombs, making environmental awareness important. Critically, avoid using Fire abilities during this fight, as fire instantly detonates bombs and can cause devastating chain reactions.

Destroying bombs before detonation should always be the highest priority action each turn, since any basic attack will one-shot them. Melee-focused classes like Fighter and Butcher excel in this encounter because they can pressure Radical Rat directly while swatting bombs between attacks. Use his trash can hiding phase as a free setup turn to reposition, heal, and queue your strongest abilities for when he re-emerges. On defeat, Radical Rat can drop the Rat Bomb weapon (letting your cats toss their own explosives) and Rad Glasses, a face accessory that grants +2 Charisma and makes your explosions deal +1 damage with +1 area, both of which synergize perfectly with explosion-focused builds.