Puzzle Chronicles

If you want to get all medals you can´t miss this achievement. It´s very easy. Go to a workshop (hammer symbol) and complete the minigame ten times. You need 2 of the same items otherwise you can't forge an item.

If you want to get all medals you have to combine ALL epic armor parts together. So you have to play this minigame about 50 times to get the last achievement for it.

Here is the list for every ultimate armor (thanks to graph1k):

(Helms)
Epic Totemic Helm--------------Skullheim
Epic Circlet-------------------------Band of the Wise
Epic Beast Helm-----------------Lionshead
Epic Spiked Helm----------------Helm of Pain
Epic Imperial Helm--------------Legion Helm
Epic Hunter's Helm--------------Helm of Darkness

(Armor)
Epic Scale Armor----------------Scales of Z'Ora
Epic Tribal Armor----------------Hide of K'Ogar
Epic Studed Armor--------------Fist of K'Thun
Epic Spiked Armor--------------Spine of L'Hal
Epic Chain Armor---------------Chains of K'Lune
Epic Plate Armor----------------Ban of Set'Al

(Boots)
Epic Rock Boots-----------------Stoneskins
Epic Marsh Boots----------------Plagueskins
Epic Nether Boots---------------Daemonskins
Epic Miner Boots----------------Goldskins
Epic Imperial Boots-------------Ironskins
Epic Jungle Boots---------------Snakeskins
Epir Desert Boots---------------Duneskins
Epic Hob Boots------------------Boots of Flame

(Belts)
Epic Belt of Might--------------Monolith
Epic Belt of Knowledge-------Glimmer
Epic Belt of Truth---------------Verity
Epic Belt of Speed-------------Zephyr
Epic Belt of Law----------------Justice
Epic Azure Belt-----------------Indigo
Epic Ogryn Belt----------------Giant's Belt
Epic Jade Belt------------------Celadon

(Weapons)
Epic Mace-----------------------Gargoyle
Epic Great Axe----------------Dark Angel
Epic Broadsword--------------Phoenix
Epic Warhammer--------------Hand of God
Epic Falchion-------------------Vyper
Epic Trident---------------------Kraken
Epic Khopesh------------------Scavenger
Epic Kuttai----------------------Ryno
Epic Spear----------------------Bloodthief
Epic Morning Star------------Bonecruncher
Epic Greatsword--------------Slayer
Epic War Pike-----------------Dragonlord

(Shields)
Epic Spiked Shield------------Tiger's Claw
Epic Great Shield--------------Tower
Epic Buckler--------------------Dreamcatcher
Epic War Shield----------------Griffin
Epic Kite Shield----------------Widow
Epic Scale Shield--------------Dragonshield

(Rings)
Epic Ring of Water-----------Waterbearer
Epic Life Ring------------------Purist
Epic Ring of Light-------------Lightbringer
Epic Swamp Ring------------Serpentine
Epic Chaos Ring--------------Daemonist
Epic Aura Ring-----------------Magister
Epic Deep Ring----------------Delver
Epic Thieves' Ring------------Skulltaker
Epic Ring of Earth------------Earthwalker
Epic Ring of Fire--------------Flammifer
Epic Desert Ring--------------Nomad
Epic Ring of Pain--------------Paingiver

(Charms)
Epic Amulet of Fury-------------Devourer
Epic Peace Rune-----------------Mediator
Epic Platinum Coin--------------King's Coin
Epic Ashurin Harp---------------Protector
Epic Manacles-------------------Slavemaster
Epic War Rune-------------------Lifetaker
Epic Imperial Harp--------------Dominator
Epic Healing Rune---------------Life Giver
Epic Snake Harp-----------------Corruptor
Epic Serpent Tooth--------------Missran Fang
Epic Wind Harp------------------Stormbringer
Epic Khazrimi Harp--------------Eruptor
Epic Chaos Skull----------------Dervish
Epic Lucky Coin-----------------Trebloon

Mid way through act four - in the third of the rescued villages a witch has kidnapped a girl. Part way through this segment there is a workshop which was guarded by a hell-hound which you have to unlock as it's a story quest.

Use this workshop to craft 10 items and you will get the achievement. It may be possible to get this on an earlier act if you have bought duplicates of lower level items but by this point you will be able to make Epic items and it will be much easier to use your collection to craft.

As there are story achievements after this point there is no reason to grind for the achievement though so if you don't have enough duplicate items just come back later.

The easiest way to gain extra items is by repeating the treasure mini-games or using a harder difficulty to get more gold and buying them.