In the video game (now often played as Heliborne Collection or Enhanced Edition ), there is no official single "unlock all" button or verified cheat code that instantly grants access to all 40+ helicopters in the online multiplayer progression system . Unlocking helicopters typically requires earning "Research Points" through gameplay.
To progress while playing alone, do not select the standard offline option. Instead, create a (2 or 4 players) and set a password . This connects you to the game server, allowing you to earn the research points and currency necessary to unlock new tiers of aircraft. 2. Research the Tech Trees heliborne unlock all helicopters verified