DoTA

The Newly Added Limits are for:
- Preventing from damages for Well-intentioned players in the game
- Preventing bad users from playing endless battle (e.g. botting)
- Stabilizing the Gold Price by preventing Infinite Farming

The Fatigue System functions as follows:
- You will be able to reach a max fatigue of 500 (200 daily fatigue + 300 bonus fatigue)
- The daily fatigue will be recovered regularly (daily basis); Fatigue can be also restored through potions
- If your total Fatigue becomes 40 or less, you will receive the "Burning Status" which will bless you with a bonus effect
- If your total Fatigue becomes 200 or more, you will receive the "Resting Bonus" which will bless you with a bonus effect

Fatigue Drainage:
- Fatigue Points will be deducted for: Season 1 & 2 battlequests and Daily Raids
- Fatigue Points will decrease as soon as you start the battle or if you join a battle as assist
- DS Battles will not descrease your fatigue points

As mentioned before, the Fatigue System will be mainly introduced to balance the economy as well as adding some necessary restrictions to prevent players from abusing the current System.

tl/dr - same as stamina system in C9

Fatigue system was postponed for now, but as stated it will surely come either changed a bit or not.

With patch 1.29 (which will be implemented on the 27.02.2013 during the maintenance) limitation for certain battle quests will be added instead of the Fatigue System.
For now, only the "Gatekeeper of the Catacombs" will be limited to 30 runs/day for each character.