How To Install Apps Without Sudo or Admin Privileges

I want to install a Game Client thing called Steam ([here](https://store.steampowered.com/about)) . It downloads a .deb package but needs root or admin password to install. I need a way to install and get Steam working without admin or root password. Are there any terminal commands I can utilize to do this? I am running Deepin 15.11 with the latest everything.