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.
I don't know what to say about this one. It's below average. The turns are far too short. The AI is absolute ****. It is unbelievably difficult or a breeze depending on where they end the turn. Sometimes they all gather in a circle and I can off all of them by the end of my turn. Sometimes I get hit by an explosive at the very ******* beginning.