The Jetstream Add-on for Metal Gear Rising: Revengeance has 4 achievements worth 100 gamerscore.
Complete DL-Story-01: Jetstream.
Defeat Sen. Armstrong without taking any damage on Hard difficulty or above.
Complete DL-Story-01: Jetstream on Revengeance difficulty in one hour or less.
Defeat 100 enemies in DL-Story-01: Jetstream's Story Mode using Quick Draw.