Battle Tactics 2 is a turn-based modification which means that you take turn with the AI. Each turns lasts about 10 seconds and after that is next one's turn. The loop continues as long as you're alive or all the enemies are dead, or you have escorted the hostage in hostage rescue gamemode.
Unbalanced beyond the point of unplayable, no tutorial, steep learning curve, first mission is thus impossible for anyone unfamiliair with turn based TACTIC-esque games.
Good idea, nice and original, not so good execution.