Here is the full list of all 37 X-Blades achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox 360.
Complete game at normal difficulty
Use every item at least once
Learn all shooting improvements
Upgrade health regeneration level to maximum
Learn all Special Form upgrades
Learn all Light spells
Collect 50 000 000 souls
Collect 5 000 000 souls
Get maximum Airstrike upgrade level
Get maximum Shooting, Melee and Airstrike upgrade level
Get maximum Melee upgrade level
Get maximum Shooting upgrade level
Execute Light form for the first time
Defeat The Dark One at The Dark Temple
Collect 50 000 souls
Complete level without losing your health
Learn all Dark spells
Execute Dark form for the first time
Execute your first combo
Kill 1000 monsters
Collect 3 gold artifact parts
Collect 3 ruby artifact parts
Collect 3 silver artifact parts
Collect 5 000 souls
Get IMPOSSIBLE hit counter
Kill a monster in the air using blades
Kill 100 monsters
Kill your first monster
Complete game at Hard difficulty
Complete game at Pro difficulty
Complete 6 levels without losing your health
Win a boss fight without losing your health
Complete level using only magic
Complete game with a “good” ending at Normal difficulty
Complete game with a “good” ending at Hard difficulty
Complete game with a “good” ending at Pro difficulty
Kill 10 000 monsters