Official Steam client with Counter-Strike 2 installed; Tournament server running the current competitive build; No third-party software, overlays, or assistive tools permitted
Why people argue about this
People often assume that using third-party software is strictly prohibited without realizing that it must be an assistive tool specifically - they overlook the fact that only non-assistive software like cheats or hacks are banned outright, leaving room for legitimate mods and utilities as long as they don't interfere with gameplay fairness.