There are 40 Riddler Trophies in Suicide Squad: Kill the Justice League, and players can earn the Oldest One in the Book! achievement by collecting them all. Additionally, a codex entry will unlock every time that one of those collectibles is found. While those rewards may not be enough to entice every player to locate all the Riddler Trophies in Suicide Squad: Kill the Justice League, this guide is here to assist fans that would like to take on the endeavor.