In "Call On Duty Sniper Assassin," you get to be a super cool sniper! You have a big, fancy sniper rifle and you need to use your awesome aiming skills to take out the bad guys from far away. Each level is like a secret mission where you sneak around, find your target, and BOOM! You make your shot count! There are different places to explore, like rooftops and forests, and you can earn shiny rewards for hitting your targets. Just remember to stay hidden and be super stealthy so the bad guys don't see you! It’s all about precision and fun!