Here is the full list of all 28 Asterix & Obelix XXL: Romastered achievements.
Complete the entire game in ''Difficult'' mode or at a higher level of difficulty
Complete the entire game in ''Extreme'' mode
Complete the entire game in ''Easy'' mode or at a higher level of difficulty
Complete the entire game in ''Normal'' mode or at a higher level of difficulty
Complete stage 6 - Rome
Complete all the time challenges
Reach the Gold level in all the time and course challenges
Complete all the course and time challenges
Find and defeat Redbeard in each level
Retrieve all the golden laurels
Complete all the course challenges
Complete stage 5 - Egypt
Buy all the combos from the merchant
Spend more than 50000 helmets at the merchant's
Complete stage 4 - Helvetia
Defeat 5000 Romans
Collect more than 99999 helmets
Strike a Roman in midair with Asterix under the effect of the magic potion when Obelix tosses a Roman
Complete stage 3 - Greece
Sling yourself using rubber bands 20 times in less than 30 seconds
Complete a course challenge with more than 5 seconds to spare on the Gold level
Defeat 200 Romans under the effect of the magic potion
Complete stage 2 - Normandy
Complete stage 1 - Gaul
Get the maximum number of shields
Keep the combo gauge full for 60 seconds
Retrieve a golden laurel
Switch between the REMASTER mode and the ORIGINAL mode