Delta Force is a first person tactical shooter game that throws the player into various missions both indoor and outdoor environs both inside and outside of the US. Game play would include stealth, all out assaults with heavy weaponry, and different access and extraction options depending upon the mission.
These games rank high on our best sniper game list because of their realistic sniper game missions with shooting and shots that the bullets drop due to the effect of gravity and veer with wind effect etc. This series games live up to their name and have stood the test of time. The sequels of this game keeps one coming back and are well deserving of their top 6 spot amongst the best sniper games.
Gamespot ranks this game 9.1/10 http://www.gamespot.com/reviews/delta-force-review/1900-2538575/
Metacritic ranks this game 9.1/10 http://www.metacritic.com/game/pc/delta-force-2