Here is the full list of all 13 6Souls achievements worth 1,000 gamerscore. It takes around 0.5-1 hour to unlock all of the achievements on Xbox One.
Complete Chapter 1.
Complete Chapter 2.
Collect the first coin.
Collect six coins.
Collect the first bacon piece.
Collect three bacon pieces.
Make thirty dash movements.
Die one time.
Die ten times.
Kill the first monster.
Kill ten monsters.
Use a lever for the first time.
Defeat the Grotos boss.