In tactical assassin 3 you have a choice of 2 different game modes; the first is for hardcore gamers and is called realism. The other game mode is ideal for casual gamers and is an arcade mode. Each of the different modes brings different attributes to the game. It is a good idea to complete the tutorial sessions so you get a good idea of what you have to do in the actually game play. In the tutorial it is divided into missions and there are eleven along with a bonus mission so have a go at completing them to see how you get on and then try the proper game play!