First off, where can I download the port? Well you first need to click here to download it off ModDB: https://www.moddb.com/mods/half-life-dreamcast/

What do I do next? Next you click the download button

Download it to your main downloads folder if you want.

Where's my Half-Life Folder at?
After that, you go to your main Half-Life 1 folder (you will need a copy of Steam Half-Life 1 for this), the easiest way to find yours is by going to the Half-Life Library page, then clicking the little gear icon seen in Image 3.

Then hover over Manage and click Browse Local Files

A file explorer window should open up and it should look something like this.

Next, right click on the File Explorer icon and click where it says File Explorer, and click it.

This second Window will be used in a second, hang tight.

Then it will open another window of File Explorer. Go to where you downloaded your Half-Life Dreamcast zip. It should be called "HalfLife_Dreamcast_v11.1.rar".

You will need something like 7-Zip (my personal favorite) to decompile/extract the .rar. (You can download 7-Zip from it's website here: https://www.7-zip.org/ ) (Make sure to download the correct versions depending on if you are running a 32 bit or 64 bit PC.) Next we will look into extracting it.

Next once it's all downloaded, extract it. (if you are using 7-Zip, extract by clicking on the .rar, then right click on it and select "7-Zip", then hit Extract files. Can be seen on Image 7.)

Once it is done, open the extracted folder, there should be a folder named "hldc". (See Image 8.)

Then pull up the other File Explorer window you have of the Half-Life Directory. Then drag and drop the "hldc" folder into the "Half-Life" Directory.

"Now what, I wanna play it!" you may say. Well there is one more step! Next you need to completely close Steam. You can do this by finding the Steam icon on your taskbar. Right click on it and click "Exit".

Then just reopen Steam. Go to your Library, it should now be there!

If for some reason it doesn't show up in the list, Search for it in the search bar. If it still doesn't show up, you did something wrong.

Now that it's there, just hit the giant "PLAY" button. The game should boot up, and you should hopefully know how to play the game from there!

There are various map edits and texture changes from the original. There are also new variants of "HD Models" for different things. Here are some images that show some differences pulled from the ModDB page here:

If you want to see some of the most notable changes, go back to the ModDB link here: https://www.moddb.com/mods/half-life-dreamcast/ and look at the images there!

Thanks for reading this! Hope it helped you out! Make sure to point out any mistakes I made in the comments! Have a good one!