The Character & Sim Mission Pack Add-on for Marvel: Ultimate Alliance 2 (Xbox 360) has 8 achievements worth 250 gamerscore.
Defeat 75 foes in "Balance."
Progress through "Insidious Alliance" without breaking any Health Containers.
Complete "Escort Duty" without destroying any turrets.
Defeat "Overload" with the X-Men.
Throw all the proximity mines in "Balance."
Complete "Insidious Alliance" with all four heroes alive.
Defeat 2 foes within 10 seconds in "Insidious Alliance."
Complete "Escort Duty" without disabling any floor hazards.