When your Mac dials into the private network of a company plotting world domination, you race to assemble proof of their scheme and deliver it to authorities.
Most of this game has nothing to do with hacking per se; it's a puzzle that involves driving a remote-control robot around the globe trading valuables between spies. (The title was picked to cash in on sensational news stories and movies like WarGames.) What was like hacking was piecing the copy I was given into working order. It turns out that the game keeps its graphics in the Scrapbook file (!), and it can't find that if the disk is named anything other than "Hack"! (I don't have an original copy of the game to compare it to, so this might well have been some sort of de-protection kludge rather than the original design.)
The opening Activision logo only displays properly on a 128K/512K Mac (real or emulated), but the rest of the game seems okay in standard Mini vMac.
Note: There's no missing manual; the game shipped without one to heighten verisimilitude.