There I want to tell a lot about this great game.
Basically this is standalone addon for original Echelon game a futurstic action/VTOL-simulation set in same universe and period but from another character perspective. The game features decent flight model which makes you feel of flight and inertion, advanced damage model, a lot of detailed ground, naval and air units and buildings with their own damage models. There many types of aicrafts and weapons to choose. The game is unique by being realistic at some point Sci-Fi vtol sim. The game locations is large, the whole continent is featured there.
The story/campaign is nice, long and even non linear at some places, the fully and nicely voiced dialogues (yeah with yelling commander etc.) also.
The graphics of original Echelon (2001) was next gen for it's time, but in WindWarriors there no much changes.
Game mechanics have a lot similarities to MechWarrior series just you control the aircraft there.
Sadly this game didn't got any sequels (forget about operation matriarchy) so the story is incomplete due publishers counted this type of games as not profitable.
There nice multiplayer with gamemodes involving teamwork and just fun deathmach, the bad thing it was using Gamespy. Unlike most of harcore sim games this is easy to learn but hard to master, in multiplayer (really!). There more action than fight with controls of your machine.
I would recommend this game if you like open locations, Sci-Fi VTOL, atmoshpere (in both meanings, this is not space <sim>) some hard missions to challenge your skills, epic and dynamic battles and unexpected turns of a plot.