Always scan .rar files from unofficial sources with antivirus software before opening, as they can occasionally contain malicious scripts. 2. Key Features in v0.123

The request for a guide on "" most likely refers to the v0.123 update for the tank design game Sprocket , which was released to improve mechanical realism and scenario variety.

If you are not referring to the tank game, you might be looking for firmware updates. However, HP typically handles updates directly through the HP Sprocket App rather than standalone .rar files. V0.123 - New Scenario + General Improvements - SteamDB

This version focused on "General Improvements" and mechanical refinements to the tank building experience:

Mass and space displays were made more compact to give players a better view of their design stats while building.

While v0.123 runs on Steam Deck, it is categorized as "Playable." You may need to use the touchscreen for some menus or manually invoke the virtual keyboard. Common Alternative Meaning

If you have downloaded a file named Sprocket.v0.123.rar , you are likely dealing with a compressed archive of game files or a specific mod pack.

If you want to use custom tanks in the new scenarios, you can manually edit game files to add your specific blueprints to the battle roster.