Sites like cs16download.com or loadcs.com provide various "editions" of the game, including "Classic" and "Legacy" versions that mimic the 2009 era.
If you're interested in playing with others, consider finding a server that suits your playstyle. Many servers offer custom game modes, such as deathmatch, and community-driven events. counterstrike 16 classic 2009 fitgirl repack link
: The most secure way to play the classic 2009-era version is through the Counter-Strike 1.6 Steam Page Sites like cs16download