Counter-Strike
Parent game
With its extensive Tour of Duty campaign, a near-limitless number of skirmish modes, updates and new content for Counter-Strike's award-winning multiplayer game play, plus over 12 bonus single player missions, Counter-Strike: Condition Zero is a tremendous offering of single and multiplayer content.
Could be interesting
Crazy Shooting Bubble Fighter(aka. 크레이지슈팅 버블파이터) is a casual TPS game by Nexon.
New SD gundam Online game, evolution from old SD gundam capsule fighter which is now closed.
Frag-A-Friend is a multiplayer first-person shooter inspired by Quake, STRAFTAT, and the stupid shit that can happen in online games. Partake in the intimate violence 1v1ing your bestie. Establish everlasting friendships with your loved ones. Kill and be killed, all in the name of camaraderie
Strap in for a high-octane rescue operation where every second counts. In this combat experience, you are dropped behind enemy lines with one objective: survive long enough to escape.
You're the Damned One, a reptilian Fallen Holy Warrior, seeking for Penance to atone for your sins against your kind. You have been given a task: Go through the gates of Hell and destroy all the sin you can see.
Customize your spaceship and set off on a fast-paced galactic adventure. Race through unique planets, blast enemies, dodge dangerous mines, and outmaneuver rivals.
Skillful marksmanship and teamwork are the keys to victory.