diff --git a/Formula/onscripter.rb b/Formula/onscripter.rb
index 9d34e94fb5024..d17d7e8725508 100644
--- a/Formula/onscripter.rb
+++ b/Formula/onscripter.rb
@@ -22,6 +22,8 @@ class Onscripter < Formula
     sha256 cellar: :any_skip_relocation, x86_64_linux:   "5a30882de58f50332809a732af98007ef932ddc259e7c928c5ff9f959a349727"
   end
 
+  deprecate! date: "2023-02-05", because: "uses deprecated `sdl_image`, `sdl_mixer`, and `sdl_ttf`"
+
   depends_on "pkg-config" => :build
   depends_on "jpeg-turbo"
   depends_on "lua"
diff --git a/Formula/sdl_image.rb b/Formula/sdl_image.rb
index c28077ca7eeed..c6571d29f3832 100644
--- a/Formula/sdl_image.rb
+++ b/Formula/sdl_image.rb
@@ -37,8 +37,7 @@ class SdlImage < Formula
   end
 
   # SDL 1.2 is deprecated, unsupported, and not recommended for new projects.
-  # Commented out while this formula still has dependents.
-  # deprecate! date: "2013-08-17", because: :deprecated_upstream
+  deprecate! date: "2023-02-05", because: :deprecated_upstream
 
   depends_on "pkg-config" => :build
   depends_on "jpeg-turbo"
diff --git a/Formula/sdl_mixer.rb b/Formula/sdl_mixer.rb
index 936ef5de9d237..2e60c663b574b 100644
--- a/Formula/sdl_mixer.rb
+++ b/Formula/sdl_mixer.rb
@@ -26,8 +26,7 @@ class SdlMixer < Formula
   end
 
   # SDL 1.2 is deprecated, unsupported, and not recommended for new projects.
-  # Commented out while this formula still has dependents.
-  # deprecate! date: "2013-08-17", because: :deprecated_upstream
+  deprecate! date: "2023-02-05", because: :deprecated_upstream
 
   depends_on "pkg-config" => :build
   depends_on "flac"
diff --git a/Formula/sdl_ttf.rb b/Formula/sdl_ttf.rb
index 712f99782c9d4..e08d5d1ad88ec 100644
--- a/Formula/sdl_ttf.rb
+++ b/Formula/sdl_ttf.rb
@@ -27,7 +27,7 @@ class SdlTtf < Formula
   end
 
   head do
-    url "https://github.com/libsdl-org/SDL_ttf.git", branch: "main"
+    url "https://github.com/libsdl-org/SDL_ttf.git", branch: "SDL-1.2"
 
     depends_on "autoconf" => :build
     depends_on "automake" => :build
@@ -35,8 +35,7 @@ class SdlTtf < Formula
   end
 
   # SDL 1.2 is deprecated, unsupported, and not recommended for new projects.
-  # Commented out while this formula still has dependents.
-  # deprecate! date: "2013-08-17", because: :deprecated_upstream
+  deprecate! date: "2023-02-05", because: :deprecated_upstream
 
   depends_on "pkg-config" => :build
   depends_on "freetype"