Where can I find usable crates, and what can I get from them?

Question

I'm looking for some crates that can be used for the achievement Free items!. I would like to know where can I find a lot of them. I know the ones near Roshamuul boat. Any other ideas?

Also, is it possible to loot something of value?

How often can they be opened?

Answer 1

This can only be done once every hour! 

 Using Crate (Usable), 2540 trials.
 

Item	Amount	Percentage	Tries to get 1
Nothing	249	9.8%	11
80 Gold Coins	276	10.87%	10
Mana Potion	268	10.55%	10
Heavily Rusted Armor	265	10.43%	10
Heavily Rusted Legs	265	10.43%	10
5 Ham	259	10.2%	10
5 Brown Mushrooms	244	9.61%	11
Dwarven Ring	243	9.57%	11
50 Gold Coins	241	9.49%	11
Health Potion	230	9.06%	12

I know many spots of them - Barkless Ab'dendriel, Thais, Cobra bastion, Roshamuul...here is all from TibiaWiki. 

Premium areas: Yalahar (Alchemist Quarter, Cemetery Quarter, Magician Quarter, Trade Quarter and Foreigner Quarter), Beregar Mines, on the roof of Cormaya 11, 9 in Tiquanda Bandit Caves, in a cave accessed during the Treasure Hunt Quest, 3 on the ship below Treasure Hunt Island and 5 in the reward room, Treasure Island in this cave, Liberty Bay (Cult Cave) -2 floor & -4 floor (behind piano), Zao Orc Land, below Chaochai, 2 in Zalamon's cave in the western room, 4 in Lower Roshamuul Inquisition camp, several around the Gnome Deep Hub.

Free areas: At the Witch house north of Thais (upstairs) next to Galuna at the Paladin guild in Thais, in Thais castle, Thais west gate in the tower, Greenshore (upstairs), next to Thais Lighthouse, and possibly more locations.

My favourites:

1. Thais

2. Roshamuul

3. Ab' Dendriel Barkless

4. Cobra Bastion

Answer 2

You can find Usable crates in many cities:

Premium areas: Yalahar (Alchemist Quarter, Cemetery Quarter, Magician Quarter, Trade Quarter and Foreigner Quarter), Beregar Mines, on the roof of Cormaya 11, 9 in Tiquanda Bandit Caves, in a cave accessed during the Treasure Hunt Quest, 3 on the ship below Treasure Hunt Island and 5 in the reward room, Treasure Island in this cave, Liberty Bay (Cult Cave) -2 floor & -4 floor (behind piano), Zao Orc Land, below Chaochai, 2 in Zalamon's cave in the western room, 4 in Lower Roshamuul Inquisition camp, several around the Gnome Deep Hub.

Free areas: At the Witch house north of Thais (upstairs here), next to Galuna at the Paladin guild in Thais, in Thais castle (here), Thais west gate in the tower here, Greenshore (upstairs here), next to Thais Lighthouse (here), and possibly more locations.

You can use one crate per hour to get an item. It's also possible to get nothing at all.If you do get something, it will be one of the following:

 80 Gold Coins
 Mana Potion
 Heavily Rusted Legs
 5 Ham
 Heavily Rusted Armor
 Dwarven Ring
 50 Gold Coins
 5 Brown Mushrooms
 Health Potion

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