I think you have made a good choice, and Source fits your situation really well. It runs on Valve's Source engine, so the graphics, physics, animations and sound are noticeably improved over 1.6 – bottles break, barrels roll, and everything feels more natural, yet the old Counter-Strike vibe is still there. The rules are the familiar ones: two teams, bomb and hostage modes on classic maps. Bots are included in the build, so your unpredictable schedule is not a problem at all – you can practise offline whenever you like and jump online when you have more time. Servers also support more players than CS 1.6, which makes evening matches feel livelier. For a proper copy, you can use this download CS S from CSD It is clean and easy to install, comes with the latest update and common fixes, includes bots, and runs on Windows 7, 8, 10 and 11. Just extract it, launch the game and you are ready to go.