It is a ground based game but there are fliers as well. Anti-Air weapons do well against fliers, traditional weapons do well against ground forces. Your infantry are basically just for capturing objectives. They don't do well attacking or defending against tanks. Like GW games there is a Force Org chart that you must adhere to but it's fairly relaxed like the newest edition of 40k. Like GW games it is a d6 system with target number (though they shift there system up one so skill 3 against defense 3 needs 5's). Models move fairly fast and there is a ton of terrain on the board so the game becomes a tactical game of hide and seek. You can shoot at and destroy buildings. Even if there are guys in them looking for the objective!I've had a hard time understanding when people have tried talking about it. I thought it was a ground-based game?
Did you have any specific questions you didn't understand about it?