No. The Steam Workshop for Heliborne contains skins and missions, not progression unlocks. Any mod claiming to unlock all helicopters for multiplayer is a scam.
: You earn points by completing missions, capturing bases, and destroying enemy positions. The Single-Player "Trap" : Standard offline single-player mode often does not grant XP heliborne unlock all helicopters verified
The fastest way to access all aircraft is through the game's internal command system. heliborne unlock all helicopters verified