The game features the same basic gameplay with Heli Attack 1, however, it has been improved a lot. It features many new weapons, better graphics and sound (which didn't exist at Heli Attack).
(Unfortunately, 3 weapons in Heli Attack 2 didn't make it into Heli Attack 3)
Heli Attack 2 won 2 awards:
Miniclip's 2003 Game of the Year
Flashkit's Most Addictive Game of 2003.