The ORCA Path is one of three story-line branches in Armored Core: For Answer. It's named for the main beneficiary of its conclusion.
Start at "Attack on Arteria Carpals" (unlocked regardless of prior mission choice).
Next, there will be two missions to choose from, one leading to the ORCA path, the other for the Destruction Path:
- "Destroy Cradle 03"
- "Defend Anti-Satellite Cannons"
To take the ORCA Path, choose "Defend Anti-Satellite Cannons."
Completing this mission will take the player to "Defeat AF Answerer" followed by the final mission, "Attack on Arteria Cranium."