Here is the full list of all 28 8-Bit Attack achievements.
Win a game with Alice Marsh.
Win a game with Amelia Azevedo.
Win a game with Aurora UltraViolet.
Win a game with Ava The Adventerous.
Win a game as Charles Dexter Ward.
Win a game as Doc Hunter.
Win a game as Elyse Greengrass.
Win a game as Eva Gothica.
Win a game as Fatmir the Flamboyant.
Win a game with Haimo the Hearty.
Win a game with Hannah Hazard.
Win a game with John Dark.
Win a game with Lysander Ocean.
Win a game with Margot The Malign.
Win a game with Peter Macron.
Win a game with Randolph Carter.
Win a game with Raymond Legrasse.
Win a game with Tarang.
Win a game with Vaike the Victor.
Win a game with Zadok Allen.
Win a game with the Health Skull on.
Win a game with the Armor Skull on.
Win a game with the Rogue Skull on.
Win a game with the Critical Skull on.
Win a game with all skulls on. LASO was taken.
Acquire ten medals, and without equipping them, enter a game and die.
Stare at the Main Menu for 10 minutes.
Lose a game.