If you want to become an intruder then you are going to have to complete the special forces recruitment program that will challenge you with all the basics of run n gun gameplay. You will engage other players in Team Deathmatch and Free for All deathmatch. Complete missions and it will help you to unlock new gear and weapons for your character. The physics shooter engine designed specifically for this game is came out beautifully and you will see how sweet it is once you start playing and see the fluid animations. You can sprint but remember the game is designed to be a tactical shooter so your running speed may hinder you at times.