Editing Battle Mode

[[File:Guitar_Battle_(GH3).jpg|thumb|300px|A Guitar Battle in ''[[Guitar Hero III: Legends of Rock]]''.]]
List of '''Battle Modes''' in the [[Guitar Hero (series)|''Guitar Hero'' series]] where two or more players verse wach other and clash each other with Battle Power-Ups.

==Guitar Battle==
In ''Guitar Hero'', a '''Guitar Battle''' is a competition between two players or a player and a computer player. In ''[[Guitar Hero III: Legends of Rock]]'', using Battle Power-Ups in place of [[Star Power]] to disrupt your opponent and make them lose.

When playing online, Battle Mode was very popular, however ''Guitar Hero'' officials claim that it was not a true way of beating another online player, as it was not a true show of talent.{{Citation Needed}}

===Guitar Battles in Career===
In ''Guitar Hero III''<nowiki>'</nowiki>s [[Career]], the player faces [[Guitar Battle vs. Tom Morello|Tom Morello]] ([[Mitch's Moose Lounge]]), [[Guitar Battle vs. Slash|Slash]] ([[Shanker's Island]]), and [[Guitar Battle vs. Lou|Lou]] ([[Lou's Inferno]]).

There is a Guitar Battle against [[Joe Perry]] in ''[[Guitar Hero: Aerosmith]]''. It is played at the end of Career Mode, and, upon beating it, Joe Perry is unlocked as a playable character.

In ''[[Guitar Hero World Tour]]''<nowiki>'</nowiki>s [[Career]], the format of the Guitar Battle format was changed. Power ups no longer appear; instead, the player tries to bring the crowd meter all the way to their side in a manner similar to the original [[Face-Off]] and [[Pro Face-Off]] modes. The two battles in ''World Tour'' are against [[Zakk Wylde Guitar Battle|Zakk Wylde]] and [[Ted Nugent Guitar Battle|Ted Nugent]]. However, Battle Mode is still available as a two player gametype. Apparently, [[Kirk Hammett]] of [[Metallica]] had recorded a Guitar Duel for ''[[Guitar Hero: Metallica]]'', but was ultimately scrapped from the game. It is rumored that the Guitar Duel would have been very challenging, with many [[slider]] and [[HOPO]] sections.

===Battle Powers-Ups===
Battle Powers-Ups (also known as Battle Powers and Attacks during the Tutorial) are earned by successfully completing Battle Power sequences (replacing [[Star Power]] sequences/phrases) without breaking combo. Each player can store up to three Battle Power-Ups to be used against the opponent to make them fail the song. Tilting the guitar controller or pressing the [[Star Power]] button triggers the player's latest stored Battle Power-Up. Players may activate multiple Battle Power-Ups they have stored to maximize the disruption on their opponent. If a player acquires a new Battle Power-Up after storing three Battle Power-Ups, the latest Battle Power-Up will be replaced.

Using Battle Power-Ups against an A.I. (Artificial Intelligence) opponent, regardless of what it is, also reduces the A.I.'s performance while the Power-Up is in effect against them.

In ''[[Guitar Hero: Metallica]]'', some Battle Power-Ups were renamed after titles of their songs and were given different visual effects based on the title name.
*'''Amp Overload''' - Distorts your opponent's highway and nakes their notes invisible and re-visible at random, making it harder to see their notes (except the tail of sustained notes retain their visibility). If used against non-A.I. players that already know the note patterns of the song, this Battle Power-Up may not affect their performance unless used in conjunction with other Battle Power-Ups.
**'''Ride the Lightning''' (''Guitar Hero: Metallica'') - Metallica's version of Amp Overload that sends a bolt of lightning on the opponent's highway.
*'''Blackout''' - Introduced in ''[[Guitar Hero: Metallica]]'' as '''Fade to Black''', this Battle Power-Up makes the opponent's highway and notes completely black, making the notes impossible to see. The highway's and notes' visuals are shortly restored.
*'''Broken String''' - Pulls one of the opponent's target icons up at random and the corresponding fret cannot be used to hit notes in that lane until the opponent repeatedly presses the corresponding fret multiple times until the sprung target icon back in base position.
**'''Damage Inc.''' (''Guitar Hero: Metallica'') - Metallica's version of Broken String. The effects are the same but the name is different.
*'''Whammy Bar '''- Lifts up the opponent's target icons off the highway that completely disables their frets until the opponent repeatedly pushes in the [[Whammy Bar|whammy bar]]. Similar to Broken String, but it disables the entire strike line rather than a single button.
**[[Trapped Under Ice]] (''Guitar Hero: Metallica'') - Metallica's version of Whammy Bar that freezes the opponent's target icons until the whammy bar is pressed repeatedly to break the ice.
*'''Difficulty Up '''- Temporarily increases the difficulty level of the opponent to the next difficulty level for upcoming notes if they were below [[Expert]] difficulty. This Battle Power-Up is not available to the player if the opponent was already playing on Expert difficulty.
*'''Double Notes''' - Temporarily adds an extra note to the opponent's upcoming notes as chords, usually 1 extra note to the adjacent right lane (left on [[Lefty Flip]]) if applicable (see below). There can only be a maximum of 3 notes per chord with this Power-Up.
**{{Fret|G}} notes become {{Fret|GR}} chords. {{Fret|R}} notes become {{Fret|RY}} chords. {{Fret|Y}} notes become {{Fret|YB}} chords. {{Fret|B}} notes become {{Fret|BO}} chords. {{Fret|O}} notes, however, become {{Fret|YO}} chords since there is no higher fret above {{Fret|orange}} and the morphed {{Fret|BO}} chord is used for {{Fret|B}} notes.
**{{Fret|YO}} chords become {{Fret|RYO}} chords, {{Fret|GB}} chords become {{Fret|GRB}} chords, {{Fret|RO}} chords become {{Fret|RBO}} chords.
*'''Lefty Flip'''/'''Righty Flip''' - Temporarily flips the opponent's fret board horizontally, making your opponent's to play on [[Lefty Flip]] (or "Righty Flip" if they normally play on Lefty Flip).
*'''Mines''' - Introduced in ''[[Guitar Hero World Tour]]'', this Battle Power-Up randomly adds grey notes on the opponent's screen. If the opponent hits a grey note, his/her Rock Meter will greatly decrease, and they will lose their most recent power-up.
*'''Steal Power-Up''' ('''Powerup Steal''' in ''[[Guitar Hero World Tour]]'' onward) - Steals the opponent's current Battle Power-Up shown. If the opponent does not have any Battle Power-Ups, it should be saved until he/she does.
*'''Death Drain''' (Sudden Death only) - A skull appears over the opponent's highway and the opponent's Rock Meter continuously drains. The meter drains faster for those on higher difficulties. This effect lasts until a player loses.

In ''Guitar Hero World Tour'', Sudden Death is replaced with "Do or Die!" In Do or Die!, the song restarts like in Sudden Death, however, '''un'''like Sudden Death, Death Drain no longer appears; instead, the song plays much faster, and some power-ups, such as Amp Overload, now last twice as long, while other power-ups, such as Broken String, now require twice as many button presses to fix.

==Guitar Duel==
[[File:Guitar Hero - On Tour - Guitar Duel.jpg|thumb|The player is hit with the Pyrotechnics Battle Power-Up in ''[[Guitar Hero: On Tour]]''. Meanwhile, the player is storing (from top to bottom) a Difficulty Down, Bomb Notes, and Hyper Speed Power-Ups, ready to be activated. Meanwhile, the opponent has two stored Battle Power-Ups unidentified and no active power on them.]]The ''[[Guitar Hero: On Tour (series)|Guitar Hero: On Tour game series]]'' on the [[Nintendo DS]] has a variation of Guitar Battle called '''Guitar Duels'''. While they are similar in having two players (or an A.I.) clash against each other with Battle Power-Ups, the winning conditions are different. Guitar Battles on console has players fighting each other until one's [[Rock Meter]] hits red to make them fail the song while players in Guitar Duels on Nintendo DS fight for the highest score until the song is over (fails are disabled). The player and the opponent share a Guitar Duel Rock Meter that determines which player has the higher score with the position of the needle (the player's side is green while the opponent's side is red).

===Battle Power-Ups===
In Guitar Duels, each player can hold a maximum of three Battle Power-Ups and each player has one active slot (as their character icon; when their character icon is replaced with a Battle Power-Up icon, another Battle Power-Up cannot be used in that active slot until that power expires.
*'''Amp Overload '''- The opponent's music volume will temporarily be muted and the opponent cannot advance the arrow to their side.
*'''Broken String''' - Randomly breaks one the opponent's strings and disables one of your opponent's fret. That fret cannot be used until the broken guitar string is pulled from the bottom to the top of the guitar on the touchscreen.
*'''Camera Flash''' - A bright light quickly flashes on the opponent's screen.
*'''Hyper Speed''' - Temporarily increases the scrolling speed of the opponent's highway.
*'''Pyrotechnics '''- The opponent's guitar will catch on fire, disabling the ability to play notes until the opponent blows into the [[Microphone#Nintendo DS microphone|microphone]] to remove the flames off the guitar.
*'''Screen Flip''' - The screens on the opponent's Nintendo DS will temporarily swap. The touchscreen when swapped still operates the same as its original screen (including Battle Power-Up slot locations) but the victim cannot open the pause menu until the effect ends.
*'''Signature''' - A fan in the crowd will ask the opponent to sign their random object (in the language of the game being played in), disabling all of his/her actions until the opponent writes/scribbles on the item until the item goes away. Such items can be a piece of clothing (shirt, sleeve, shoe, etc.), skateboard, mobile phone, and more.
*'''Steal Item''' - Allows the player to see their opponent's stored Battle Power-Ups and steal any one of them if they have any stored, otherwise this Battle Power-Up will be wasted if an item is not selected within 4 seconds. While this Battle Power-Up is active, no one can activate any Battle Power-Ups until it resolves or expires. This Battle Power-Up cannot be activated if a Battle Power-Up is currently active on either player.
*'''Difficulty Up''' - Temporarily increases the opponent's difficulty level by 1 level. This Battle Power-Up is not available to the player if the opponent is already playing on Expert.
*'''Difficulty Down''' - Temporarily decreases the difficulty of the user but increases the user's base score of notes hit during that time (A.I. opponents that use this Power-Up do not get an increase in base score which benefits the player instead) and temporarily prevents the opponent from activating offensive Battle Power-Ups while this is active just like Shield. This power-up cannot be activated while another Battle Power-Up is on your character icon.
*'''Bomb Notes''' - This Battle Power-Up temporarily replaces some upcoming notes at random on the opponent's highway with bomb-like notes. If the opponent plays a bomb note, their score will decrease and their streak will reset. Ignoring/missing these bomb notes will automatically play these notes as if they were normal notes.
*'''Shield''' - Temporarily prevents the opponent from activating offensive Battle Power-Ups while this is active. This power-up cannot be activated while another Battle Power-Up is on your character icon.

==Videos==

===[[Tom Morello]] and [[Slash]] Guitar Battles===

====Tom Morello====
[[File:Tom Morello Guitar Hero 3 Battle FULL|425px]]

====Slash====
[[File:Guitar Hero 3 slash battle EXPERT! (full)|425px]]

===[[Lou]] Guitar Battle===

====Lou's Victory====
[[File:GH3 Full Battle vs. Lou Expert|425px]]

====Player's Victory====
[[File:Guitar Battle vs. Lou - Guitar Hero 3 - Guitar (Expert)|425px]]

===[[Zakk Wylde]] and [[Ted Nugent]] Guitar Battles===

====Zakk Wylde====
[[File:Guitar Hero World Tour Zakk Wylde Guitar Battle|425px]]

====Ted Nugent====
[[File:Guitar Hero World Tour Ted Nugent Guitar Battle 97%|425px]]

==Trivia==
*Although the Broken String power-up randomly disables one of the fret buttons and has an icon of a pair of scissors, the attack is misnamed; if a string actually was broken, it would be permanently disabled. It's possible that power-up doesn't actually break the string, but instead pulls the string loose and out of tune, and pressing the fret button twists the [[wikipedia:machine head|machine head]], tightening the string and putting it back in tune.
**Additionally, the power-up implies that each fret button represents a string on the guitar. However, this is also a flawed implication, as a real guitar has 6 strings, whereas the guitar controllers (at least until ''[[Guitar Hero Live]]'') have only 5 buttons.
**In ''[[Guitar Hero III: Legends of Rock]]''<nowiki>'</nowiki>s [[Career]], some Power-Ups only appear in later battles; Broken String first appears in [[Guitar Battle vs. Slash|Slash's Guitar Battle]], and Lefty Flip only appears in [[The Devil Went Down To Georgia|Lou's Guitar Battle]].
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