Twisted Treeline

The Twisted Treeline is a two lane Field of Justice, released shortly before the game officially launched.

October 27, 2009: Released publicly in practice games Practice games

March 30, 2010: Released for normal games on.

The Twisted Treeline map was reworked, and the new version released with patch V1.0.0.150 on October 17th, 2012. It was previously located near Zaun, but was retroactively relocated to the Shadow Isles.

Lore
The Field of Justice known as the Twisted Treeline is one of the League arenas. The arena is located in the mysterious Shadow Isles. An eternally thick, unnatural fog blankets the islands from the view of outsiders. It is thought that the islands are home to countless forms of undead, though no one seems eager to perform the exploration necessary to find out the truth.

The Arrival of Nightmare
Summoners in the League of Legends were afflicted by sleep-related incidents for a long time, some wake up screaming, terrified and beyond consolation. Some could not fall asleep, slowly going mad as night ticked by. Some simply never woke up. Physicians were baffled until a Field Architect happened to pass out next to a nexus on the Twisted Treeline. With a magical energy arced from the nexus, appeared and slaughtered everything in his sight before the summoners were able to magically confine him. As a punishment for all of his crimes, The League allowed summoners to call upon Nocturne, bending his will to the summoners he hates and creating his own personal nightmare.

Gameplay
The Twisted Treeline is a two lane map where two teams consisting of three players battle in fast-paced action while their ultimate goal is to destroy the enemy team's nexus. Aside from its two, slightly curved lanes, the map also features several neutral monster camps and two altars to be captured as well as a free health pick-up - all situated in the jungle between the lanes - giving plenty of opportunities for team fights. There is also a path over the top lane which leads to lair. The team who defeats the horrific creature inside receive the, which provides bonus health and mana regeneration as well as an attack speed buff and 20% cooldown reduction.

In-Game Description
Deep in Shadow Isles lies a ruined city shattered by magical disaster. Those who venture inside the ruins and wander through the Twisted Treeline seldom return, but those who tell tales of horrific creatures and the vengeful dead.

Features

 * Two lanes to fight your way to the enemy base.
 * A jungle populated by neutral monsters of varying degrees of toughness.
 * Powerful turrets defend key areas on the map. You must confront these in addition to your enemies if you are to make headway toward victory.
 * Two bases at opposite sides of the map, populated by a shop, a nexus and one turret to defend the nexus.
 * A Ghost Relic is located in the middle of the map.
 * Two altars situated on both sides of the lower jungle. An altar is sealed for 90 seconds after capturing it.
 * New items to complement its fast-paced gameplay, and 825 base starting gold.

Strategy

 * Work with your teammates to use the close lanes as a chance to kill enemy Champions as a team.
 * The basic strategy is to have 2 players laning on the bottom and 1 player laning on the top, allowing for one stronger player to develop ahead of the other 2 and have a large advantage when ganking the bottom lane enemies. Laning should not continue for too long though as it is much quicker to level and gain gold from ganking enemies once you are strong enough.
 * The more competitive strategy is to have 2 players laning at the top and 1 laning at the bot. This setup has better (and jungle in general) control. If there are 2 champions on 1 lane, only one of them should farm, a farmed champion + support are more useful in teamfights than 2 unfarmed champions.
 * Another viable setup is two solo lanes with a jungler. The jungle remake on Twisted Treeline made mobs more tough and there are not that many viable junglers now.
 * When champions that are effective at jungling are played in top lane, killing jungle monsters to outlevel your opponents and get neutral monster buffs is a strategy that is commonly used.
 * The jungle area in Twisted Treeline is good not only to sneak on the opponent but also to outsmart them by running away or baiting them into a bad position.
 * AD carries are viable on Twisted Treeline, but they must be protected by team like on Summoner's Rift. Roles of champions are more or less the same as in 5v5, but a setup with a AD carry should have enough cc to make him/her safe.
 * A critical area is the lair of, located at the top of the map. It is a high value objective, so pay close attention to the location of enemy champions so that you are aware when they attempt to take him down. Keep in mind that the revised Twisted Treeline's shop does not carry wards, so vigilance is your only means of protecting the spider from the other team.
 * Although wards do not exist in the shop, some champions like , , , , , , and have abilities that can be effectively used as wards.

Twisted Treeline Items

 * Consumable:
 * Advanced Items:
 * Legendary Items:
 * Mythical Items:
 * Legendary Items:
 * Mythical Items:
 * Legendary Items:
 * Mythical Items:
 * Mythical Items:
 * Mythical Items:
 * Mythical Items:

Important timers

 * Minions spawn: 1:15
 * Minions meet: 1:37
 * Jungle monsters spawn: 1:40
 * Heal spawn: 3:00
 * Altars unlock: 3:00
 * Vilemaw spawns: 10:00
 * Surrender time: 15:00

Twisted Treeline Camps

 * Lower jungle:
 * On each side of the jungle we can find 3 camps:
 * and one
 * and two
 * and two
 * All monster camps respawn in 50 seconds after the death of the entire camp.
 * Upper jungle:
 * spawns at 10 min mark and respawns 5 minutes after dying.

Twisted Treeline Buffs

 * All champions passively gain up to +150% mana regeneration based upon their percentage of missing mana (e.g. 0% mana+150% regeneration, 50% mana+75% regeneration, 100% mana+0% regeneration).
 * Ghost Relic: Replenishes 94-315 health and a small amount of your ability resource. It also grants a brief speed boost. Spawns at 3:00 and respawns every 90 seconds.
 * bonus health and mana regeneration, increased attack speed and bonus cooldown reduction.
 * Altars:
 * One Altar: +3 gold on unit kill
 * Two Altars: +10% attack damage and ability power

Trivia

 * After capturing one of the two altars on Twisted Treeline champions originating from the Shadow Isles, which include, , , , and , the summoned "spirit" will say unique messages to those particular champions. The messages are different for west and east altars, representing good and evil respectively. This, however, excludes , because Riot didn't want to give too much information about her lore, and , because lines for him have not been recorded yet. In addition, all Shadow Isles champions can also hear additional lines available to all of them, including Evelynn and Thresh. All the messages can be seen here or on the altar page.
 * If two champions dance in front of  within 5 seconds,  will join in.
 * The Twisted Treeline's remake is heavily influenced by concept and development.

Development
Marc Merrill in an interview with Zam.com first mention the map :
 * So in regards to the new map, which is one of the hottest items that we're really excited about, we're about to roll one out. It's going to be going into the beta shortly. I don't know if it's in this release or if it's in the release at the end of the month. It's coming out really soon, it's a two lane map, it's awesome, there's a lot of action, it's really well designed to force action to the middle of the map, and it's designed for a 3 on 3 play experience. So it's very different experience, it will be a lot of fun for users to go bang away on that.

The map was first shown to the public on October 19th, 2009 on the games' Facebook page.