Nearly everything you do in ECHO is inspired by cave drawings that spring to life when you click on them. You get things started by locating some colored powder that can be mixed with water and turned to paint. You must then paint a grid to match a certain pattern on an amulet you have in your possession. This triggers a cutscene and advances the story.

You can collect items and combine them to create new items, but in an interesting twist you can actually alter items in your inventory to build new ones. In most areas there is a “construction site”, an area where you can place items and modify them with tools or combine them with other items in your inventory.