Here is the full list of all 46 Medieval Moves trophies - there are 34 bronze, 8 silver, 3 gold and 1 platinum.
Complete all trophies
Complete Story mode on King difficulty
Use every character in a Battle Mode
Earn all unlockables in Battle Mode
Defeat Foreman without taking any damage
Collect all of the Royal Treasures
Complete a chapter on the Champion difficulty or higher without drinking any milk (excluding Flash Forward, Edmund's Training and A Change of Plans)
Collect all of the Story Scrolls
Avoid taking damage during the boulder dash portion of Boulder Dash
Destroy all Morgrimm Machines in Story Mode
Yank down the outhouse in the Siege Camp
Free a total of 2,500 enemies in your lifetime
Defeat Morgrimm only using the bow and arrow
Complete the chapter One Small But Determined Warrior
Complete the chapter A Massive Task
Defeat Peter the Giant in under 5 minutes and 30 seconds
Throw 75 sticks of dynamite
Play 50 multiplayer games
Drink 50 bottles of milk
Complete a chapter without taking any damage (excluding Flash Forward, Edmund's Training and A Change of Plans)
Break 500 objects
During Escape! defeat an ogre using only rocks
Complete the chapter The Hammer and the Nail
Grapple pull 50 cauldrons in Cauldron Chaos mode
Successfully defend 15 waves in a single Royal Guard match
Free 100 enemies within a single Invasion Mode match
Complete the chapter Passing Time
Free 100 critters... for fun!
In Turning of the Gears free an enemy by closing the trap door on them
Pick up 500 gold coins in Story Mode
Complete the chapter The Crepes of Wrath
Defeat the Chef Boss without using your sword or bow and arrow
In A Cool Dry Place free skeletons by yanking the hot bowl of soup onto them
Complete the chapter Over the Wall
Free 15 enemies in a single Amulet power up use
Get 250 Headshots with the bow and arrow
Win a multiplayer match in every game mode
Get at least one of every type of pick up
Complete the chapter Guiding Light
Defeat Roland without getting knocked back
Make it through the arena section of The Arena without drinking any milk
Successfully use the bow and arrow, throwing star, the sword and shield against a single non boss enemy
Complete the 3 point controller calibration in under 3 seconds
Complete the chapter The Arena
Complete the chapter Rooftops
Complete the chapter Edmund's Training