Almost every level has secrets and collectibles in Doom: The Dark Ages, though there are a few exceptions, such as Barrier Core and From Beyond which don't have secrets. And the missions that do have secrets vary in size quite a bit, with some only having a handful and others having a whole shopping list of things to uncover.

Doom: The Dark Ages is a fast-paced, first-person action game where the golden rule is to shoot, punch, or explode anything that moves. Otherwise, you will probably die. Traversing the infernal maps to complete the campaign requires not only good reflexes — you also need to use everything at your disposal to survive the battlefield.

Filled with annotated maps and detailed step-by-step tips, this guide will help you discover all the secrets and collectibles in.