Counter-Strike 1.6 Royale is a good modification of the original game called Counter-Strike 1.6 . 
In this version was added more realistic weapons and textures without LAG ! The game works online and offline ! 
You can have 100FPS with a PC with this minimum specs : 
- Ram : 384Mb 
- CPU : 1.0Ghz 
- HDD : 850Mb 
How to play this game ? Just follow this instructions : 

1.Download the game throught a torrent client 
2.Follow the installer instructions 
3.You'll have a desktop shortcut of the game , just run it ! 
4.You can play on any server you want :) 
 
http://i.imgur.com/6oaPb0U.jpg - ScreenShot 

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