Overview
C-1000 is the upgraded counterpart to C-800, encountered in The Bunker with 500 HP. Like its predecessor it draws from the Terminator archetype but represents a dramatically harder fight: double the HP, likely enhanced attack patterns, and potentially new phase mechanics not present in the C-800 encounter. This is a late-game endurance fight.
Key Mechanics
Adaptive or Shapeshifting Mechanics
The C-1000 name (echoing the T-1000 from Terminator 2) suggests possible shapeshifting or adaptive mechanics: the ability to change form, resist previously effective damage types, or reconstruct after taking damage. If C-1000 has a regeneration mechanic, focus burst damage to overwhelm the regen rather than relying on slow consistent damage.
Strategy
Bring your most-developed party. At 500 HP this is one of the longer Bunker fights. DoT stacking is valuable but ensure it does not get cleansed by any adaptive mechanic C-1000 might have.
If your DoT stops working mid-fight, immediately switch to a burst damage rotation. Having both DoT and burst options available (rather than optimising entirely for one) is the safest approach against an enemy with unknown adaptation.
Healer is mandatory. A 500 HP mechanical enemy will sustain combat pressure long enough to require multiple healing actions.