In order to complete the Chapter 2 of Darksiders Genesis, you will have to defeat a boss. To reach the boss, you need to open one of the passages.
Follow this guide to know “How to reach the boss in Chapter 2”
In order to reach the boss, get to The Slag Heap location. Visit three locations with enemies, jump to one of the platforms and head towards the end where you should find various opponents. Once you reach there go ahead and defeat them.
Likewise, you need to repeat the same with the other two signs. Reach the very end and defeat the opponents. Next, you will need to destroy the fire wall. For this, fire your Vorpal Blade and aim at the wall to destroy it. This should activate all the signs for you.
This is when you will face the Slug Demon. Upon defeating the boss the Chapter 2 of Darksiders Genesis ends.