Here is the full list of all 25 Soulsland: Last Fight achievements.
Play Castle Ruins
Find captured souls Castle Ruins
Play Old Town
Find captured souls Old Town
Play dungeon
Find captured souls dungeon
Play desert map
Find captured souls desert
Play coral town
Find captured souls coral town
Play flying town
Find captured souls flying town
Play arena
Find captured souls arena
Play tropic village
Find captured souls tropic village
Play dark dungeon
Find captured souls dark dungeon
Find golden skull desert map
Find golden skull tropic village
Find golden skull dark dungeon map
Play land of grass
Find captured souls land of grass
Play Windmills area
Find captured souls windmill area