Here is the full list of all 40 Marvel Super Hero Squad: Comic Combat achievements worth 1,000 gamerscore.
Sold 1,000 issues
Defeated an enemy using only Hold abilities
Drained two full bars of ink in a single attack
Used a single ink attack to defeat 2 or more enemies
Sold 10,000 issues
Completed Issue 1
Used two decoys simultaneously
Exited a panel with a full ink meter and all heroes at full health
Revived a hero to full health
Sold 7,000 issues in a single panel
Used a decoy to distract 3 or more enemies at the same time
Used Hero Up!
Defeated 3 or more enemies with one glyph ball roll
Picked up a health pack when a hero was about to be defeated
Found 5 Comic Stacks
Opened a Factor Lock for each factor
Completed Issue 2
Used a glyph bomb to defeat 5 or more enemies at the same time
Started a panel with a hero wearing an alternate costume
Used Hulk to destroy 25 breakables
Used Hero Up! five times in one issue
Completed a panel with all heroes in alternative costumes
Completed Issue 3
Defeated 5 enemies simultaneously
Played as Squirrel Girl in a back Issue
Hit six targets with one hex using Scarlet Witch
Used Hero Up! to defeat 6 or more enemies
Completed a panel using Wolverine, Reptil, and Hulk
Completed a panel using Scarlet Witch, Squirrel Girl, and Invisible Woman
Completed Issue 4
Completed Issue 5
Completed Issue 6
Picked up 1,000 Hero Points
Used an Earthquake to defeat 5 or more enemies
Picked up 75 Hero Points in a single panel
Defeated Doctor Doom in the end boss battle
Brought Squirrel Girl into the final fight against Doom
Sold 1,000,000 issues
Found all the Comic Stacks
Survived the laser hallway without getting hit by laser