Earth Under Siege : Flashpoint Initial Playthrough

About Earth Under Siege: Flashpoint, from BoardGameGeek:

Earth Under Siege: Flashpoint is a co-op, sci-fi dungeon crawler where players complete covert missions against an invading alien force bent on subjugation of the entire Earth. It has only been six months since the Xethan first appeared and they have already conquered large numbers of military bases all across Europe. If their momentum is not halted, the human race may well fall to these alien invaders. Someone must stop them. Earth Under Siege: Flashpoint missions are heavily focused on stealth, covert actions, and sabotage. Players are Operatives of AEGIS, and their missions are focused on infiltrating enemy facilities, using every method available, such as cutting the power, using the ventilation shafts, making use of silenced weapons, and hacking into the enemy database. Players develop their Operatives and HQ over the course of a 30+ mission campaign as they follow the story deeper and deeper until they uncover the true nature of the Enemy and where they came from. Each round, players perform actions with their Operatives by exhausting one of their six action tokens until they run out of available tokens, or choose to pass. But players must be judicious in their use of their action tokens, because they normally only recover three of them each Refresh Phase. Each Operative comes with a unique deck of Tactics cards which gives them access to powerful actions and effects. Each Player will develop these decks over the course of the campaign allowing them to tailor their gameplay to a particular style or focusing on specific combos.