It's a standalone (like Dynamic Campaign Engine) single player/coop dynamic campaign, in which you capture the land from the oppressor by conducting a series of various operations to weaken military base defenses and finally capture them, liberating the map bit by bit.
Features:
Most of the modules and maps are already supported
Both sides are playable, with appropriate aircraft for each other
Supports single player and co-op multiplayer!
Multiple aircraft with different roles participating in the fight (Escort+CAS+Ground attack units versus Interceptors+AA+Ground defenders)
A number of missions types including Strikes, CAS, Anti-AA, CAP, ship attack, interceptions, escort and troops transport, which will be conducted by both sides of the conflict
Carrier operations, both transport and attack helicopter operations, AWACS (251 MHz), tanker (140 MHz)
Economy system which will reward you with money for completing operations, which you could spend to buy new planes and vehicles
Progression in both quality and quantity - the deeper you go into enemy territory, the more advanced planes and ground units you will encounter, and in greater quantities
Large amount of customization options (also a modding guide in which you can fine tune the campaign)
Dynamic weather and time for every operation, visual frontlines that move closer to the base as you lower its defenses
Project has been inherited by Khopa and is currently hosted on his repository: https://github.com/Khopa/dcs_liberation/wiki/Getting-started.