Story related and cannot be missed. Just simply play the game.
There are 5 memories in DNA Sequence 8.
Memory 1 - Birds of a Feather
Memory 2 - If at First You Don't Succeed
Memory 3 - Nothing Ventured, Nothing Gained
Memory 4 - Well Begun is Half Done
Memory 5 - Infrequent Flier
When you complete Memory 5, the achievement will unlock.