DownFall is a Half-Life 2 single-player mod taking place in the White Forest surroundings. You're once more putting on the HEV suit as Gordon Freeman. Your mission is to recover a newly developed technology by the resistance, known as the "citadel buster", before the Combine manage to destroy it.
Additional Information
This game is excluded from Steam Family Sharing because: Free Game
Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
This game supports Steam Deck's native display resolution but does not set it by default and may require you to configure the display resolution manually
In-game interface text is legible on Steam Deck
This game's default graphics configuration performs well on Steam Deck
SteamOS:
This game runs successfully on SteamOS
Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration