Easy «That’s A Two-fer» achievement:
Find two item boxes at the end of any Act 1 to get the «That’s A Two-fer» achievement.
They are always in the same place. At the end of Green Hill Zone — Act 1, simply knock
the Sonic/Dr. Eggman sign into the big sunflower on the right, and between the purple
flowers on the left.
Easy «The Password Is Special Stage» achievement:
Reach the special stage ring hidden underneath the barrel in Mirage Saloon — Act 2.
Once you reach the large barrel in the stage, simply push it to fall below and reach
the hidden ring and get.