This can be done during the first three tutorial missions. There are many of spiders that will die from a single punch. Switch to bare hand mode before the battles through the "Inventory" screen, then kill all the spiders in the initial missions.
Play the third battle, where you control Cassie, the spider, and a despaired man. Cassie is the only one that must reach the safe zone to end the battle. Use your spider to break barrels to access the chest, then hide the spider behind it. Go for the lever with the man as quickly as possible to open the gate. Pass through the gate with Cassie, and reach the door. Hit the lever, then run to the safe zone to get the "No Blood! No Blood!" achievement.
Play the second battle. You can kill the first spider easily, then run. Cycle through the spike trap and fire trap to kill the rest of the enemies and get the "No Weapons" achievement.
Complete the following achievements to unlock Microsoft Gamerscore points.
Achievement | How to unlock | Points
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| - Naurim is good. Nothing is more important than family!
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| - Takate is dead. Kamaluq gives, Kamaluq takes.
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| - Zurbaran is evil. Power corrupts.
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| - Killed ten enemies with your bare hands. Vin Diesel would be proud!
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| - The spider survived the tutorial. Its eyes see everything.
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- Can't Be Stopped in Melee!
| - Unlocked all upgrades for Swordfighters.
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| - Unlocked all upgrades for Archers.
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| - We bow before the First Kyria!
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| - Cassia sits on her throne. You have to fulfill your wishes!
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| - Zurbaran is dead. A wizard should trust no one.
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| - Zurbaran has survived. Take care, ladies!
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| - Naurim is evil. Greed corrupts.
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| - Defeated two Creators. Everyone does as you say.
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| - Cassia is beloved by the people
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| - All Creators defeated. The land needs new Creators!
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| - Controlled one of Tykates' Leapers with his melody.
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| - Controlled at least twenty creatures with a melody.
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| - Controlled Shinna's insect with a melody.
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| - Controlled Adamant's sand with a melody.
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| - Controlled the Druid's tree creature with a melody.
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| - Completed a fight without armor. Because you can.
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| - Successfully ended a fight without killing or hurting an enemy.
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| - Faramud's missions completed. No one is innocent.
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| - Freed all prisoners. Trust is the most important ingredient.
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| - All prisoners killed. Just to be sure.
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| - Completed a fight without weapons. Because you can, show-off!
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| - Found all treasure chests and opened them. Oh the greed...
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| - All training fights completed.
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| - Zurbaran is good. Nothing overcomes love!
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| - Takate has survived. He will keep on killing forever.
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| - Naurim is dead. A dwarf should trust no one.
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| - All shall be mine! Conquered all points on the world map.
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| - Naurim has joined you. He has grown much fatter.
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| - Cassia is a master of melee.
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| - Takate has joined you. He has grown more silent.
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| - Cassia is a master of archery.
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| - Unlocked all upgrades for Spearfighters.
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- The Last Days of a Kyrios
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| - Zurbaran has joined you. He has become much older.
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| - Unlocked all upgrades for Faramud.
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| - Not a single good deed. Everyone fears you!
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| - Not a single evil deed. Everyone loves you!
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| - The Hounds of War have joined you.
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| - Cassia is a master of the arcane arts.
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| - Kicked at least twenty enemies into an abyss.
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| - Naurim has survived. Can a dwarf grow any fatter?
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| - Cassia is hated by the people
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| - Stopped all couriers. No message goes past you.
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| - Cassia's court has a new scribe.
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