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Guitar Hero III Les Paul Controller Compatibility with Guitar Hero I on PS2

Short answer: No. The Guitar Hero III (Les Paul) wireless controller does not work with the original Guitar Hero on PlayStation 2.

Why They're Incompatible

Game	Controller Protocol	Dongle
Guitar Hero I (2005)	Wired (PS2 controller port) or RedOctane Wireless (2.4 GHz proprietary)	Specific to GH1/GH2 dongle
Guitar Hero II (2006)	Same as GH1	Same dongle
Guitar Hero III (2007)	New wireless protocol (different chipset)	New dongle (black, smaller)

The GH3 dongle cannot pair with a GH1/2 receiver.
The GH1/2 dongle cannot pair with a GH3 guitar.
Wired GH1/2/3 guitars (rare) only work on their respective games due to firmware checks.

Cross-Compatibility Matrix

	GH1/2 Dongle	GH3 Dongle	GHWT/5/6 Dongle
GH1/2 Guitar (Wired)	✅	❌	❌
GH1/2 Wireless	✅	❌	❌
GH3 Les Paul	❌	✅	✅ (GHWT+)
GHWT/5/6 Guitar	❌	✅	✅

Solution: Pick up a GH1/2 wireless guitar with its dongle (often ~$30 on eBay) or use a wired GH1/2 controller. The GH3 guitar works perfectly on GH3, World Tour, 5, Warriors of Rock, and Band Hero.

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