Carla Spore

Clones: head, arms and legs, then the finisher. The faces can't be destroyed.

What's left of Carla spread through the ship. Ada clones (small spores): gooey copies with acid boils that burst when you get close or shoot them. They're among the toughest creatures in the game and can't be destroyed for good, so ignoring them is almost always best. To kill one: head → each arm → legs → it kneels → finisher; bolts take a limb in 1–2 hits. The tiny variants (3 red eyes on a lump) die in one hit, but burst acid up close. Arms in the walls: they grab and hold you (rotate the stick; Breakout helps). Smiling faces that open into jaws and bite: steady fire makes them flinch, but they can't be destroyed; freeze them with the blue nitrogen tanks.

Clones: 50–100 SP or, more often, ammo

The giant face at the end is the boss: Carla Radames. On low difficulties you can let the arms grab you and break free; on high ones, avoid them.