The Commander Lilith & the Fight for Sanctuary Add-on for Borderlands 2 has 6 achievements worth 250 gamerscore.
Activate the Backburner's firewall.
Allow Tiny Tina to arm the moonshot cannon.
Defeat Haderax the Invincible.
Defeat the Dark Web.
Equip effervescent-quality gear in all slots (except class mod).
Complete the mission "Paradise Found".