vitaXash 3D (Half-Life port) updated to version 4 - Counter Strike support, big stability improvements, better performance and more! - Wololo.net
CSPSP v1.91 file - CS:PSP - Mod DB
Fewnity on Twitter: "Counter Strike PS Vita and Nintendo DS cross-platform 😱😱😱 Yes, these two consoles are on the same server 😜 #gamedev #homebrew #remake https://t.co/4O1hoU7m0C" / Twitter
CS:PSP file - Mod DB
Counter-Strike 2 is a Free Upgrade to Counter-Strike: GO, Limited Test Starts Today
CS Portable PSP - GameBrew
PSP Counter-Strike 2000 (Update and Info) - YouTube