Hitman Sniper is a first-person, scope-based shooter in which 47 will not suffer counterattack, but will fail if the target detects an assassin and flees (some targets will choose to hide), or if the guards go on full alert (the assassination will still succeed if the target is on full alert). So 47 needs to be as stealthy as possible to carry out the assassination without anyone in the villa noticing. A direct shot will attract the attention of witnesses, and using indirect methods such as triggering electrocution and falling off the building, the guards will assume there is no suspicion. In addition, the backup ammunition is unlimited, and loading the gun will lead to a quick reaction event where the player needs to swipe the screen, success will cause the 47 to load fluently, failure will slow down the loading speed.

The characters in the map include high profile targets, guards and civilians. High-profile targets are the characters that 47 needs to kill, while killing other high-profile targets outside of the mission objective also earns a lot of points. The guards patrol the houses and investigate if they find anything unusual. Civilians who find anomalies will inform the nearby guards, and there is no reward or penalty for killing civilians. New high-profile targets need to be unlocked by gathering information, and targets that do not obtain relevant information are treated as civilians. There are also items on the map such as laptops and champagne bottles, which can be destroyed to score points or as a way to lure enemies.

The game has 6 chapters without any storyline, the first chapter is a teaching mission, and the second chapter starts to the end is the actual battle. Each contract is to assassinate one of the 11 high-profile targets. There are also secondary missions such as getting a certain amount of points and killing guards in a specific way. Players need to complete the secondary tasks first before assassinating the main target, and killing only the main target will count as an incomplete contract. If the player gets stuck, he can use in-game currency to buy to skip the current task, but he will not be rewarded for doing so.

As the game progresses, 47 can acquire new weapon blueprints and assemble weapons by collecting parts. Or fight for ranking on the leaderboard and get exclusive weapons when you reach a new rank. Weapons that need to be paid for have more powerful performance. Each weapon has its own bonuses and abilities, abilities such as displaying enemies and items capable of destruction for a limited time, jamming radio communications, bonuses such as bullets penetrating more, guards becoming more lax than usual in their guardedness, etc. It is worth mentioning that the characters will only hear the sound of bullets whistling past or hitting objects, so even if some guns are not equipped with silencers, the opponent only a couple of hundred meters away will not hear any gunshots.

In the "Valley of Death", the player's task is to defend a man who is repairing a car and kill the incoming zombies. Sniper Challenge" the firearms in the "Valley of Death" can not be used, and the transformation of weapons can only be carried out in the battle. The "Valley of Death" has three difficulty levels to choose from: normal, hard and expert. Normal and Hard difficulty require 47 to successfully defeat several rounds of zombie attacks, while Expert difficulty is an endless survival mode. "Death Valley" also has its own leaderboard, but there is no ranking, and there are no rewards for trying to rank.