Here is the full list of all 11 The Ultra Code achievements.
Break your first code
Break your first difficult code
Light the first bulb on the war effort meter
Fill half the war effort meter
Complete the game but lose the war
Complete the game and win the war
Complete all the difficult codes without buying extra bulbs and fill the war effort meter
Break at least five codes
Break at least 10 codes
Break at least 15 codes
Complete a game without skipping a code