Grand Theft Auto: San Andreas Mission Guide / Walkthrough Video in High Definition. Mission No. Location: San Fierro, San Andreas. Mission Name: Snail Trail. Mission Boss: C.R.A.S.H. / Officer Frank Tenpenny & Eddie Pulaski. GTA Series Videos is a dedicated fan-channel keeping you up to date with all the latest news, video walkthroughs and official trailers of the most successful video games published by Rockstar Games, including Grand Theft Auto series, Red Dead Redemption, Max Payne, L.A. Noire, Bully and many others. |--| This channel is in no way tied to Rockstar Games or Take-Two Interactive. Follow GTA Series Videos on:. || YouTube -.