KAYF-LIFE Linux Download: Missing Install Button
Try the wishlist-to-library route when KAYF-LIFE’s install button is missing on Linux, and check the Half-Life 2 ownership requirement.
Half-Life 2 community mod
Own Half-Life 2 before installing this community mod. Find help for a missing Linux download entry or a Windows menu cropped into the top-left corner.

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Available guides
Each guide covers one clear task and links back here when you need another route.
Try the wishlist-to-library route when KAYF-LIFE’s install button is missing on Linux, and check the Half-Life 2 ownership requirement.
Set the game executable’s high-DPI scaling override to Application when the Windows menu shows only its top-left quarter.
Use the developer's restart advice for the reported post-bridge load failure, with the current-map replay cost and console-enabling location made clear.
Sources