The Serum Antidote Codex appears in Unstoppable. It shows all The Serum Antidote ingredients, and once discovered they glow green. A version of it is seen in The Unstoppable Puzzle. CodexBlank.JPG|Antidote Codex as you first see it AntidoteCodexNTR.jpg|Antidote Codex after completion of Unstoppable Mission 1: Written in Stone Antidote Codex 2.png|The current antidote codex, as seen after adding the first two books and completing the first two missions. codex.PNG|Complete Codex