Guitar Hero II is best played with a guitar controller.
Note: Be wary of websites claiming to compress a full PS2 DVD game down to sizes like 50MB or 100MB. These are almost always fake files or contain malware. Realistically, a highly compressed PS2 ISO will still be over 1GB. Guitar Hero 2 Ps2 Iso Highly Compressed
Developed by Harmonix and released in 2006, Guitar Hero II is widely considered one of the best entries in the franchise. With its killer setlist (think "Sweet Child o' Mine," "Free Bird," and "War Pigs") and the introduction of 3-note chords, it remains a fan favorite. Guitar Hero II is best played with a guitar controller