Unity

The most popular game engine for making games, is a hit or miss on decompiling.

To start out, first identify what type of game you have.

Mono

Mono games usually include a "MonoBleedingEdge" folder and sometimes a D3D11/12 folder.

If you don't see this, your game might look like example 2, with a (game name)_Data folder, and the Mono folder being nested inside.

IL2CPP

Warning!

This is a dangerous warning.