Modders are rebuilding the home screens of old consoles on the Steam Deck, and nearly all of that work runs through one plugin. CSS Loader, made by the DeckThemes group, injects stylesheets into Steam's Game Mode interface while it is running.
The results look like a Wii menu or an Xbox 360 dashboard. They are skins over Valve's own interface, not replacements for it.
What the themes actually change
CSS Loader describes itself as a tool that loads CSS files from storage and reloads alongside the Steam UI. Its latest tagged release is v2.1.2, published on July 7, 2024, under a GPL-3.0 licence, and the code sits at https://github.com/DeckThemes/SDH-CssLoader.
Every theme declares a target. The DeckThemes store uses Home, Background, System-Wide, Library, Tweak and Profile, and all of them affect Game Mode rather than Desktop Mode.
Switch Like Home, version 1.4, is credited to SuchMeme and Scyu_ and was last updated on July 3, 2024. Its own description says it bottom aligns the recent games list and moves the game name above the selected game.
Wii Theme, version 1.5, by OT-Archmage, says it styles the Deck to feel more like a Wii. It was last updated on January 27, 2023.
XBOX 360 NXE .profile, by Lohre2000s, was updated on August 6, 2025. The author calls it an attempt at the classic Xbox 360 NXE dashboard.
Animated PSP Waves Background, version 1.10, by GuiSS, was updated on June 22, 2026. It draws the XMB wave background in CSS using the PSP's colours, with adjustable wave height, width and speed.
Sound comes from a separate plugin. Audio Loader, by EMERALD0874 and Beebles, replaces Steam UI sound effects, and packs named PlayStation 5 Home Menu, Xbox 360 NXE Dash UI and Wii U Home Menu sit in the same store.
Installing this means running homebrew Valve does not ship
None of it works without Decky Loader, the third-party plugin launcher at https://github.com/SteamDeckHomebrew/decky-loader. The current stable release is v3.2.10, published on October 4, 2026, under GPL-2.0.
Installation starts in Desktop Mode with a downloaded installer file. Decky's README says you either type your admin password or let the installer set one temporarily and remove it when it finishes.
The installer then re-runs itself as root. It creates a homebrew folder in the user's home directory, switches on Steam's CEF remote debugging, and installs a plugin_loader system service.
This is not software Valve ships, stores or supports. Decky's own instructions also warn against installing plugins from untrusted sources.
System updates are the other catch. Decky's feature list claims it stays installed between SteamOS updates, while its own troubleshooting section says Decky sometimes disappears after one and that the fix is to run the installer again.
Steam client updates break the themes separately. CSS Loader v2.1.0, from March 14, 2024, added a system that pulls class name mappings from a DeckThemes server, because Valve keeps reworking the Game Mode interface and renaming the classes themes hook into.
The artwork and sound question
Some of these themes ship console assets, and the projects are open about where they came from. Wii Theme's listing states that its images are ripped or adapted from the Wii Menu HD Texture Pack by SuperDuperRob.
The Xbox 360 theme goes the other way. Its description says the button icons are not included, and the author asks users to message him privately to get them.
The PSP theme ships no console artwork at all and draws its waves in code. None of the listings checked declares a licence of its own, and no takedown or legal notice appears on the store or in the repositories.
The full interface rebuild is not out yet
A larger project has been reported from a developer using the handle Vegetenks, one that would redraw Game Mode as a 3DS or Wii U interface instead of restyling it. There is no code to look at.
The repository at https://github.com/Vegetenks/SteamU was created on October 10, 2026 under an MIT licence. As of October 15, 2026 it holds a single file, a LICENSE, with no releases, no tags and no readme.
Whether that becomes a genuine interface replacement or another stylesheet is not confirmed by anything its developer has published. It is a familiar pattern on the Deck, where community projects usually arrive before any official support does.
Until that code appears, the console home screens on the Steam Deck are CSS layered over Valve's menus. They break whenever Valve renames something, and they can vanish with the next system update.
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