diff --git a/Core/Compatibility.cpp b/Core/Compatibility.cpp
index 7f0ec47269..6be33200bf 100644
--- a/Core/Compatibility.cpp
+++ b/Core/Compatibility.cpp
@@ -41,5 +41,6 @@ void Compatibility::Clear() {
 
 void Compatibility::LoadIniSection(IniFile &iniFile, std::string section) {
 	iniFile.Get(section.c_str(), "NoDepthRounding", &flags_.NoDepthRounding, flags_.NoDepthRounding);
+	iniFile.Get(section.c_str(), "PixelDepthRounding", &flags_.PixelDepthRounding, flags_.PixelDepthRounding);
 	iniFile.Get(section.c_str(), "GTAMusicFix", &flags_.GTAMusicFix, flags_.GTAMusicFix);
 }
diff --git a/Core/Compatibility.h b/Core/Compatibility.h
index 5f03cd4bed..a5a3a7fa07 100644
--- a/Core/Compatibility.h
+++ b/Core/Compatibility.h
@@ -46,6 +46,7 @@
 
 struct CompatFlags {
 	bool NoDepthRounding;
+	bool PixelDepthRounding;
 	bool GTAMusicFix;
 };
 
diff --git a/GPU/GLES/FragmentShaderGenerator.cpp b/GPU/GLES/FragmentShaderGenerator.cpp
index 20a09bd314..8e4794aeb7 100644
--- a/GPU/GLES/FragmentShaderGenerator.cpp
+++ b/GPU/GLES/FragmentShaderGenerator.cpp
@@ -1045,6 +1045,13 @@ bool GenerateFragmentShader(const ShaderID &id, char *buffer) {
 		WRITE(p, "  %s = vec4(1,0,1,1);\n", fragColor0);
 	}
 #endif
+
+	if (gstate_c.Supports(GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT)) {
+		WRITE(p, "  highp float z = gl_FragCoord.z;\n");
+		WRITE(p, "  z = (1.0/65535.0) * floor(z * 65535.0);\n");
+		WRITE(p, "  gl_FragDepth = z;\n");
+	}
+
 	WRITE(p, "}\n");
 
 	return true;
diff --git a/GPU/GLES/GLES_GPU.cpp b/GPU/GLES/GLES_GPU.cpp
index f5a2d7e7a1..c7a8b8d188 100644
--- a/GPU/GLES/GLES_GPU.cpp
+++ b/GPU/GLES/GLES_GPU.cpp
@@ -562,9 +562,13 @@ void GLES_GPU::CheckGPUFeatures() {
 		features |= GPU_SUPPORTS_TEXTURE_LOD_CONTROL;
 
 	// In the future, also disable this when we get a proper 16-bit depth buffer.
-	if (!PSP_CoreParameter().compat.flags().NoDepthRounding)
-		features |= GPU_ROUND_DEPTH_TO_16BIT;
-
+	if ((!gl_extensions.IsGLES || gl_extensions.GLES3) && PSP_CoreParameter().compat.flags().PixelDepthRounding) {
+		features |= GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT;
+	} else {
+		if (!PSP_CoreParameter().compat.flags().NoDepthRounding) {
+			features |= GPU_ROUND_DEPTH_TO_16BIT;
+		}
+	}
 
 #ifdef MOBILE_DEVICE
 	// Arguably, we should turn off GPU_IS_MOBILE on like modern Tegras, etc.
diff --git a/GPU/GPUState.h b/GPU/GPUState.h
index 4bfdb83a07..e5d68333b3 100644
--- a/GPU/GPUState.h
+++ b/GPU/GPUState.h
@@ -454,6 +454,7 @@ enum {
 	GPU_SUPPORTS_BLEND_MINMAX = FLAG_BIT(4),
 	GPU_SUPPORTS_LOGIC_OP = FLAG_BIT(5),
 	GPU_SUPPORTS_ANY_FRAMEBUFFER_FETCH = FLAG_BIT(20),
+	GPU_ROUND_FRAGMENT_DEPTH_TO_16BIT = FLAG_BIT(22),
 	GPU_ROUND_DEPTH_TO_16BIT = FLAG_BIT(23),  // Can be disabled either per game or if we use a real 16-bit depth buffer
 	GPU_SUPPORTS_TEXTURE_LOD_CONTROL = FLAG_BIT(24),
 	GPU_SUPPORTS_FBO = FLAG_BIT(25),
diff --git a/assets/compat.ini b/assets/compat.ini
index a041af774c..155751c110 100644
--- a/assets/compat.ini
+++ b/assets/compat.ini
@@ -66,6 +66,15 @@ NoDepthRounding = true
 NoDepthRounding = true
 
 
+# Heroes Phantasia requires pixel depth rounding.
+[NPJH50558]
+PixelDepthRounding = true
+[ULJS00456]
+PixelDepthRounding = true
+[ULJS00454]
+PixelDepthRounding = true
+
+
 # GTA audio issues
 # These games stream their radio stations from disc as giant audio files. They seek into
 # the correct position. Our ATRAC3 module (sceAtrac) implementation is still not very accurate