Games like Tom Clancy's Rainbow Six 3: Raven Shield
Squad
Squad is a large scale combined arms multiplayer first-person shooter emphasizing combat realism through communication, team play, emphasizing strong squad cohesion mechanics as well as larger-scale coordination, tactics, and planning. It features 20 large open maps, vehicle-based combined arms gameplay, and player-constructed bases to create a heart-thumping, visceral gaming experience with split-second decision-making in real-world scale firefights.
Escape from Tarkov
Escape from Tarkov is a hardcore and realistic online first-person action RPG/Simulator with MMO features and story-driven walkthrough.
Counter-Strike
Play the world's number 1 online action game. Engage in an incredibly realistic brand of terrorist warfare in this wildly popular team-based game. Ally with teammates to complete strategic missions. Take out enemy sites. Rescue hostages. Your role affects your team's success. Your team's success affects your role.
SWAT 4
To simulate realistic police procedures, SWAT 4' encourages the use of non-lethal force to subdue and arrest subjects rather than incapacitating or killing them. In addition, players must follow strict protocol to ensure proper use of force. Players may not fire on suspects with lethal weapons unless the suspect points their firearm at a fellow officer or a civilian. Penalties are given for unauthorized use of force, injuries to hostages, officer incapacitation, and personal injury. On the higher difficulty levels, more points are required to pass the mission, with 100 being perfect. On the most difficult level, Elite, players need a 95/100 to pass, and will fail for killing even a single suspect, losing more than two team members without committing an infraction, or committing any infraction in addition to being injured.
Rogue Warrior
Rogue Warrior is a character-driven, first-person-shooter, featuring Richard Demo Dick Marcinko's explosive personality in an action-packed single player campaign, and intense multiplayer combat.
Tom Clancy's Rainbow Six: Lockdown
Engineered specifically for the PC by Red Storm Entertainment, Rainbow Six returns to deliver the tensest close-quarters battles ever experienced online. In this episode, Rainbow faces independent terrorist threats, tied together by one common element - the Legion virus. Rainbow must determine the connection between the terrorist threats and the virus.
Delta Force: Black Hawk Down
In late 1993, the United States launched dual military operations in Mogadishu Somalia. Delta Force Operatives and Army Rangers were sent in to capture Somali warlords and restore order. Experience the intense combat of Operation Restore Hope in this ground breaking first person shooter. As a Delta Force operative participate in a number of daring and intense raids against the oppressive Somali warlords in and around Mogadishu.
Tom Clancy's Ghost Recon
The Red Army is back. Now that Russia's government has collapsed, a hardline leader is bent on taking over the republics. Enter Ghost Recon, an advanced, futuristic squad of U.S. Army soldiers. Unlike previous Rainbow Six games, the setting is much more focused on the military instead of anti-terrorist maneuvers. Next-generation inventory and weapons will give players a glimpse into the real U.S. Army "Land Warrior" program on which Ghost Recon is based.
Tom Clancy's Rainbow Six
A combination of explosive action and real-life strategy! The most revolutionary action/strategy game of its kind. Nothing comes closer to offering an exciting combination of strategy, team-building, realistic three-dimensional graphics and true-to-life special forces action. The ultimate goal is to save yourself and the world from deadly terrorists. You must successfully complete 17 unique missions. If you die, the game isn't over. The World is.
Global Operations
Global Operations is a first-person tactical shooter computer game developed by Barking Dog Studios and published by both Crave Entertainment and Electronic Arts. It was released in March 2002. (Wikipedia)