Over the years, Counter Strike has undergone many significant changes, both in terms of the mechanics of the game and the graphics engine used. Starting from the same premise, some iterations were more popular than others, and if fans would be wondering which version of the game has delighted the most, then the obvious answers would be Counter Strike 1.6.
Launched several years ago, Counter Strike 1.6 is not very demanding in terms of hardware resources required, but only now someone has managed to port it to mobile. Going over the evidence you can see in the above below, it is worth mentioning that the experiment was conducted on a Android devices. The only problem is that the people at Valve who were behind the original game, are not responsible for this port.
Instead, a developer named Alibek Omarov managed to create the tools from scratch to play the full version of the Counter Strike 1.6 on Android devices. Also, it is not just talking about two maps recreated for mobile, but full game that you could play on your PC.
Because the entire solution proposed by Alibek is legal, and so if you want to play Counter Strike 1.6 on Android, then the game has to be purchased and installed on Steam. This iteration of the game will be based on touch sensitive controls depicted on screen with features that will not help you to be very efficient in-game. In any case, if it was one of your childhood games and you are curious how this title behaves on the smartphone, you need to follow all the instructions found here https://github.com/a1batross to play Counter Strike 1.6 on Android devices.