Do not use random torrents or “direct download” websites. Visual novel piracy is rampant with viruses (since the files are small and unassuming). Here are the only official storefronts you should use:

: A fully animated version that uses footage from the anime series combined with newly produced animation for routes not originally adapted. It is available on Steam . Steins;Gate 0

: For mobile users, the game is included as part of the Crunchyroll Mega Fan or Ultimate Fan memberships. Enhancement Patches

Don’t worry about needing a gaming rig. Visual novels are lightweight.