diff --git a/dotfiles/.config/hypr/layout/windowrules.lua b/dotfiles/.config/hypr/layout/windowrules.lua
index a1c095d..791ea00 100644
--- a/dotfiles/.config/hypr/layout/windowrules.lua
+++ b/dotfiles/.config/hypr/layout/windowrules.lua
@@ -57,6 +57,11 @@ hl.window_rule({ name = "windowrule-24", tag = "+im", match = { class = "^(im.ri
 -- game tags
 hl.window_rule({ name = "windowrule-25", tag = "+games", match = { class = "^(gamescope)$" } })
 hl.window_rule({ name = "windowrule-26", tag = "+games", match = { class = "^(steam_app_\\d+)$" } })
+-- While Sunshine is streaming, open Steam games fullscreen on the headless stream output
+-- (workspace 9 -> HEADLESS-1). Old games like KOTOR fix their render size/scaling at launch
+-- and never adapt to a later resize, so they must start there. Off by default (local play
+-- unaffected); toggled by ~/.config/sunshine/scripts/sunshine-games.sh via the global.
+SunshineGamesRule = hl.window_rule({ name = "sunshine-games", enabled = false, workspace = "9", fullscreen = true, match = { class = "^(steam_app_\\d+)$" } })
 
 -- gamestore tags
 hl.window_rule({ name = "windowrule-27", tag = "+gamestore", match = { class = "^([Ss]team)$" } })