60 Seconds! is a game and is not legally available for free download as a full version for PC. While some sites may offer "free" links, these are often unsafe and can contain malware. Official Ways to Get the Game
: A free, quirky 2D indie game with a similar "end of the world" premise available on Steam and mobile stores. 60-seconds-pc-game-free-download-full-version
: The primary platform for the standard version and the upgraded 60 Seconds! Reatomized version. 60 Seconds