‘Sierra 7’ is totally based on shooting and killing your enemies. Before starting the game, you will need to choose a callsign. This will be your high score reference name. Then choose the graphics quality and difficulty level. When you are in the game missions, you will be asked to complete the training first. This is a must-give test for every beginner. The mission is named as ‘Sierra 7 training’ and the location is in Nevada, USA. You will need to complete the course within the time limit. To pass the training, your time must be under 1:45:00. Once you pass this training, you are through to the next mission named as ‘Irish Safehouse’. There, a known terrorist bomb technician and his militia have seized a hotel in Morroco. You will need to eliminate them and any threat of an explosive.