Installation infomation #

It is recommended to install third-party software via Flatpak on the Steam Deck.
This can be done by searching for PolyMC in the Discover software center, in Desktop Mode.

After installing PolyMC, set it up as usual.
When you are done, open up Steam (still in Desktop Mode), click on Games in the menubar, and then click on Add a Non-Steam Game to My Library....
There you can find and select PolyMC and click ADD SELECTED PROGRAMS.
Now PolyMC should be in your Steam Library.

Artwork #

Now that you have PolyMC in your Steam Library, you might want to change the artwork of your PolyMC Non-Steam Game, so that it looks better in your library.

Examples #

Setting up Artwork #

You first need to find artwork for PolyMC.
One option is to check out PolyMC's SteamGridDB page for our official artwork, as well as community-provided artwork.
Alternatively, there also is a SteamGridDB page of Minecraft.
In any case, select the artwork you'd like to use, and download it onto your Steam Deck.

First, we will set the background (also called "hero" on SteamGridDB) and the logo. In desktop mode, go to your steam library, and select the PolyMC Non-Steam Game. Right-click at the top, and select Set Custom Background.

Now, navigate to where you have saved the images, and select the background. I saved them in my Downloads folder, which will have the path of /home/deck/Downloads.
Then do the same thing for Set Custom Logo, and select the logo.

Additionally you can change the cover-art (also called "grid" on SteamGridDB).
There are two types of cover-art, one is the normal vertical one, and the other is the wider one.

To change these, you should first start PolyMC through Steam, and close it again.
This way, you can now head over to your library, and right click PolyMC in the RECENT GAMES shelf.
It should be using a wide cover as it's the last-played game.
Now, right-click the cover, and select Set custom artwork under Manage.

Navigate to where you have saved the images, and select the wide cover-art.

Then start a different game, and close it, so that PolyMC is now the second game in the shelf (with a vertical cover).
Now, you can again, right-click the cover, and select Set custom artwork under Manage.

Navigate to where you have saved the images, and select the vertical cover-art.

Additionally, you can add an icon and rename the Non-Steam Game to Minecraft.
To do so, right-click on the PolyMC Non-Steam Game, and select Properties. At the top, you can rename PolyMC to Minecraft, and you can change the Icon by clicking the empty square that is to the left of the name, and then select the image you want to use.

Tips and Tricks #

• For the best experience, go ahead and enable Start Minecraft maximized, and Close PolyMC after game window opens in the launcher's settings, under the Minecraft tab.
• If you want Minecraft to launch without the PolyMC launcher, add -l <instance-id> in the launch options for your PolyMC Non-Steam Game. If you use this launch option, make sure that Close PolyMC after game window opens is disabled in the launcher's settings, so that the launcher does not show up when the game is closed. See CLI launch options for more.
• Install a mod that enables controller support. See Controller Support for more.