To see your current percentage of the game's completion, pause the game while in the hub.
Achievement Guide:
http://www.xboxachievements.com/forum/showthread.php?t=57448...There are 250 Mithril Bricks to be collected in the game. Bricks are used for forging Mithril Treasure Items, which are in turn used to acquire Red Bricks.
Note: The Mithril Bricks will glitch and show a different number than what you have collected. You're total mithril bricks won't add up until you spend the bricks at the blacksmith, once you do the total will update. There is a Mithril brick that gets overlooked it's hiding underneath the Town-Goblin sign in the hub world.
• You need to buy all the custom character pants, heads, and bodies; such as the whole costume of a chicken or dragon. The character customization is located in Lake-Town.
• It is needed to customize an Orc or Horse in Beorn's Homestead.
Requirements on getting 100% completion are as followed:
Completing each Story level (16 total):
Start playing and enjoying the story first then worry about collecting stuff after.
Collecting all 10 minikits in each level (16 total):
http://www.xboxachievements.com/forum/showthread.php?t=57509...Locating the schematic in each level (16 total):
http://www.xboxachievements.com/forum/showthread.php?t=57509...Collecting all four treasures items in each level. 64 treasures total. (16 total):
http://www.xboxachievements.com/forum/showthread.php?t=57509...Obtaining Master Burglar in each level (16 total):
Collecting the rest of the schematics in Middle-earth hub. (16 total):
http://www.xboxachievements.com/forum/showthread.php?t=57555...170 Mithril bricks throughout Middle-earth hub (Fetch Quest):
Complete the Bonus Level:
Unlock and purchase all 98 characters:
http://www.xboxachievements.com/forum/showthread.php?t=57478...Purchase all 32 Red Bricks:
http://www.xboxachievements.com/forum/showthread.php?t=57555...Customize a character (in Lake-town) or creature (in Beorn’s Homestead):
Forge all 32 Mithril items and complete the red “?” fetch quests:
http://www.xboxachievements.com/forum/showthread.php?t=57555...Stud Farming: