Guitar Hero Arcade is primarily based on the gameplay and theming of the PC version of Guitar Hero III: Legends of Rock, reducing some of the features such as character customization, no career mode, and no whammy bar on its Enduro-AX Industrial Strength Guitar Controllers, but keeping the ability to download new songs and software updates for the cabinet from the Internet.

Gameplay

While Guitar Hero Arcade is graphically based on Guitar Hero III: Legends of Rock and sharing similar game engines, there are some notable differences between the two.

Since Guitar Hero Arcade is an arcade rhythm game, it will lack a Career mode and is primarily focused on Quickplay with one or two players in Cooperative, Face-Off, or Pro Face-Off (Guitar Battle is not available). To begin playing songs, the player(s) must first add at least 1 credit [token] to the coin slot of the guitar controller they will be using and press the Start button on the arcade cabinet’s console. For two players, a credit must be added to the other coin slot as well.

Player(s) can choose their Guitar Hero III character (including Axel Steel, Casey Lynch, Izzy Sparks, Judy Nails, Johnny Napalm, Lars Umlaut, Midori, Slash, Tom Morello, God of Rock, and Grim Ripper, all unlocked from the start), toggle Lefty Flip in the character select screen with the orange fret, choose their difficulty level (also includes a Beginner difficulty level since a v1.13 update that allows the player(s) to play songs with or without using any frets, but this feature may be incomplete), and a song to play. Most songs require 1 credit, but “premium songs” require another credit to play them. Guitar Hero Arcade features many songs from Guitar Hero III: Legends of Rock including Guitar Hero III’s DLC and their note charts. The available setlist per machine/location depends on what songs the operator enables or disables.
Guitar Hero Arcade at Funhaven

A Guitar Hero Arcade machine located at Funhaven in Ottawa, Canada in 2016.

Comparing guitar controllers, the Enduro-AX Industrial Strength Guitar Controllers that are attached to the Guitar Hero Arcade cabinet are notably heavier than any guitar controller on console. While these guitar controllers also lack a whammy bar, Star Power energy does gradually increase automatically on starred long notes during Star Power phrases. There is no Star Power button, but the guitars do have tilt support for Star Power if the operator has it enabled in the operator settings. Also, the guitars lack a Start button so once a song is in session, the game cannot be paused during gameplay—the cabinet’s Start buttons will not pause songs. However, players can still fail songs.

Furthermore, depending on how the arcade operator configures the audio/video calibration and guitar calibration settings in the game’s operator/debug settings (a hidden menu inaccessible to players), players may notice there is audio delay, video delay, or input lag, and may misplay notes despite what is heard or seen on screen, making the arcade machine feel unplayable unless if the player(s) can adjust to the lag or ask the owner/operator to recalibrate them.

Source: Fandom.com (https://guitarhero.fandom.com/wiki/Guitar_Hero_Arcade)
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