I suggest collecting ideas here that will help diversify tactical missions (tasks) in the game.
Mission: "The release of prisoners on the alien Base."
The aliens have built an underground base on planet Earth, where they keep prisoners for experiments (20-50 people). The player's task is to destroy the guards (1st floor). Destroy (capture) personnel (2 st underground floor). Find the prison and break down the doors (in order for the hostages to escape).