"Doom Builder" is a base construction game in a post-apocalyptic setting. It is quite troublesome to download this game. The first step to download is to install the Steam platform, then register an account to log in, and Search for "Post-Apo Builder", then click to buy, then click to play now.
How to download Doom Builder
You can choose the Steam platform to download "Doom Builder".
The Steam platform requires you to install the Steam platform first, then register an account to log in, and then search for "Post-Apo Builder" to enter the store purchase page.
Click Add to Cart, then pay to purchase, and finally enter the store purchase page again and click Play Now to select the file download location to start downloading.
You can download it from the Steam platform at: https://store.steampowered.com/app/1550190/PostApo_Builder/.
The EPIC platform and PS platform have not been logged in yet, and console players still have to wait.