How to use Lookupper on Steam Deck

This guide was written by a community member. If you have additional questions, you can contact the author on Telegram: Andrey Kuznetsov. Sorry that screenshots are in Russian.

This method of using Lookupper on Steam Deck is based on streaming from a home PC using Remote Play and is highly dependent on your network speed. Ideally, it is best to be on the same local network, for example, playing at home over Wi-Fi 5 or higher. In general, any non-“prehistoric” router will work, but older ones may require lowering the streaming quality and/or FPS (Frames Per Second).

1. Linking Steam Link

Log in to the same Steam account on both your Steam Deck and PC.
On the Steam Deck, press the physical STEAM button → Settings.
In the Remote Play tab, enable it and make sure to enable “Hardware Decoding”.
On the PC, go to Steam → Settings.
In the Remote Play tab, enable the “Enable Remote Play” toggle. Your Steam Deck should appear in the “Computers and Devices” list.
In “Advanced Host Options”, make sure to click “Enable hardware encoding”. For NVIDIA graphics cards, “Use NVFBC capture” is also recommended.

Important Note on Linking:

During the first launch on the Steam Deck, a window with a 4-digit PIN code may appear.
This code will need to be entered on the PC to confirm the link.
To do this, on the PC, go to Remote Play settings, click “Link Steam Link” and enter the code from the Steam Deck.

2. Checking and Configuring Streaming

Download the necessary games on your PC.
On the Steam Deck, go to the game’s page, select the arrow to the right of the “Launch/Install” button, and select Stream from PC.
Check that everything works, and select the optimal streaming quality for comfortable latency.
- It is recommended to play around with the Steam Deck settings for “Picture” and “Bandwidth Limit”.

3. Configuring the Lookupper Hotkey

Assign a hotkey for Lookupper on the PC. For example, Ctrl + * (on the numpad).
In the game’s control layout settings on the Steam Deck, assign this combination to a button.
It is most convenient to assign it to one of the back buttons (e.g., R5), and set the right trackpad as a mouse.
Check in the game: hover the mouse over a word (using the trackpad) and press the bound button.
It might “think” a little the first time, but then everything will work normally.
If you have a monitor with a resolution higher than FHD (e.g., 1440p), the Lookupper text will be painfully small. Make it larger with Ctrl + mouse wheel over the pop-up, and drag the pop-up’s bottom-right corner to make it bigger.