Best Games Like Counter-Strike: Condition Zero

In Battlefield 2, players will choose to fight for one of three military superpowers: the United States, the Chinese, or the newly formed Middle East Coalition.

Counter-Strike: Global Offensive expands upon the team-based action gameplay that it pioneered when it was launched 19 years ago. CS: GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content

The player has two primary weapon slots, a handgun slot and can carry up to eight grenades (all of the later Call of Duty games feature only two weapon slots, a sidearm will fill one of these slots).

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.

Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source technology.

A tactical shooter with realistic properties, it adapts various features absent in previous installments of the franchise such as the ability to see one's weapon while in first-person view, many new weapons and upgrades, as well as a redesigned

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.

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.

Enlist in an intense brand of Axis vs. Allied teamplay set in the WWII European Theatre of 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)