In Search of Sanity is the third studio album by English thrash metal band Onslaught, released in 1989. This album was originally recorded with Sy Keeler, but London Records were not impressed with the final product from a commercial point of view and enforced a re-mix and a complete re-recording of the vocals by Grim Reaper frontman Steve Grimmett, being the only album featuring him. It features their two longest songs to date, "Blood Upon the Ice" and "Welcome to Dying".