There are various missions with optional side quests, but how you complete them is entirely up to you like using noise to mask your shots. You can also target grenades on the enemies with explosive results. The gameplay is similar to Splinter Cell in that you move from Point A to B, observing the environment for enemies and using various strategies and tactics to take them out like shooting an explosive barrel near groups of enemies, setting traps with trip mines to blow up tanks. One has to wonder if Rebellion took design cues from Ubisoft's flagship stealth series, which has yet to see a seventh installment. From the desert sands, rocky caverns, underground bunkers, and enemy bases, Sniper Elite 3 boasts some impressive visuals with splendid attention to detail in the environments with smooth animation and lighting effects which even surpasses that of the Splinter Cell series. The first thing you'll notice about the 3rd game is it's graphics. Sniper Elite 3, a prequel to the 2nd game in the series, is a step up in many ways.
I've never been big on games that lets you target enemies from afar I prefer up close and personal combat, but having played this for the first time in years a year ago, I was really impressed and enjoyed the game immensely.