diff --git a/README.md b/README.md
index 9b2a4c6c..ef91021b 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ Have a look at the yquake2 repository for the "normal" Yamagi Quake II:
 https://github.com/yquake2/yquake2
 
 Alpha windows 64 bit [binaries](https://github.com/yquake2/yquake2remaster/releases).
+Saves format is unstabled and could change between alpha releases.
 
 State:
  * GL1/GLES3/GL3/GL4/VK:
@@ -29,20 +30,20 @@ Monsters:
 
 Models support:
 
-| Format | Original Game   | Frame vertex | Meshes | Comments                                |
-| ------ | --------------- | ------------ | ------ | --------------------------------------- |
-| mdl    | Quake 1         | 8 bit        | Single | Unsupported grouped textures            |
-| md2    | Quake 2         | 8 bit        | Single |                                         |
-| md2    | Anachronox      | 8/10/16 bit  | Single | No tagged surfaces, unchecked with game |
-| mdx    | Kingpin         | 8 bit        | Many   | No sfx support, unchecked with game     |
-| fm     | Heretic 2       | 8 bit        | Many   |                                         |
-| def    | SiN             | Part of sam  | Many   | Unchecked with game                     |
-| dkm    | Daikatana DKM1  | 8 bit        | Many   | Unchecked with game                     |
-| dkm    | Daikatana DKM2  | 10 bit       | Many   | Unchecked with game                     |
-| md3    | Quake 3         | 16 bit       | Many   | No tags support                         |
-| md5    | Doom 3/Quake 4  | float        | Many   | Requires md2 for skins                  |
-| sbm    | SiN             | Part of sam  | Many   | Unchecked with game                     |
-| sam    | SiN             | 8 bit        | Many   | Unchecked with game                     |
+| Format | Original Game   | Frame vertex | Meshes   | Comments                                |
+| ------ | --------------- | ------------ | -------- | --------------------------------------- |
+| mdl    | Quake 1         | 8 bit        | Single   | Unsupported grouped textures            |
+| md2    | Quake 2         | 8 bit        | Single   |                                         |
+| md2    | Anachronox      | 8/10/16 bit  | Single   | No tagged surfaces, unchecked with game |
+| mdx    | Kingpin         | 8 bit        | Multiple | No sfx support, unchecked with game     |
+| fm     | Heretic 2       | 8 bit        | Multiple |                                         |
+| def    | SiN             | Part of sam  | Multiple | Unchecked with game                     |
+| dkm    | Daikatana DKM1  | 8 bit        | Multiple | Unchecked with game                     |
+| dkm    | Daikatana DKM2  | 10 bit       | Multiple | Unchecked with game                     |
+| md3    | Quake 3         | 16 bit       | Multiple | No tags support                         |
+| md5    | Doom 3/Quake 4  | float        | Multiple | Requires md2 for skins                  |
+| sbm    | SiN             | Part of sam  | Multiple | Unchecked with game                     |
+| sam    | SiN             | 8 bit        | Multiple | Unchecked with game                     |
 
 All models support only single texture for all meshes and frames limit based on game protocol.
 
@@ -74,6 +75,8 @@ Maps support:
 Note:
  * Non Quake 2 maps are limmited mostly view only, and could have issues
    with tranparency or some animations flags and properties.
+ * If you like support some other maps type, create pull request for Mod_Load2QBSP
+   function and provide a link to demo maps.
 
 Games:
  * Quake 2:
diff --git a/src/client/menu/menu.c b/src/client/menu/menu.c
index 2dede985..3be524ee 100644
--- a/src/client/menu/menu.c
+++ b/src/client/menu/menu.c
@@ -5731,6 +5731,7 @@ PlayerModelList(void)
 
 		if (ContainsFile(s, "tris.fm") == false &&
 			ContainsFile(s, "tris.dkm") == false &&
+			ContainsFile(s, "tris.def") == false &&
 			ContainsFile(s, "tris.md2") == false &&
 			ContainsFile(s, "tris.md3") == false &&
 			ContainsFile(s, "tris.md5mesh") == false &&
diff --git a/src/client/refresh/gl1/gl1_model.c b/src/client/refresh/gl1/gl1_model.c
index 64a699f4..b040e65c 100644
--- a/src/client/refresh/gl1/gl1_model.c
+++ b/src/client/refresh/gl1/gl1_model.c
@@ -474,6 +474,8 @@ Mod_ForName(const char *name, model_t *parent_model, qboolean crash)
 	/* call the apropriate loader */
 	switch (LittleLong(*(unsigned *)buf))
 	{
+		case SDEFHEADER:
+			/* fall through */
 		case MDXHEADER:
 			/* fall through */
 		case DKMHEADER:
diff --git a/src/client/refresh/gl3/gl3_model.c b/src/client/refresh/gl3/gl3_model.c
index 795534a1..8fe1d7b3 100644
--- a/src/client/refresh/gl3/gl3_model.c
+++ b/src/client/refresh/gl3/gl3_model.c
@@ -475,6 +475,8 @@ Mod_ForName(const char *name, gl3model_t *parent_model, qboolean crash)
 	/* call the apropriate loader */
 	switch (LittleLong(*(unsigned *)buf))
 	{
+		case SDEFHEADER:
+			/* fall through */
 		case MDXHEADER:
 			/* fall through */
 		case DKMHEADER:
diff --git a/src/client/refresh/gl4/gl4_model.c b/src/client/refresh/gl4/gl4_model.c
index 5107a935..baefec1d 100644
--- a/src/client/refresh/gl4/gl4_model.c
+++ b/src/client/refresh/gl4/gl4_model.c
@@ -475,6 +475,8 @@ Mod_ForName(const char *name, gl4model_t *parent_model, qboolean crash)
 	/* call the apropriate loader */
 	switch (LittleLong(*(unsigned *)buf))
 	{
+		case SDEFHEADER:
+			/* fall through */
 		case MDXHEADER:
 			/* fall through */
 		case DKMHEADER:
diff --git a/src/client/refresh/soft/sw_model.c b/src/client/refresh/soft/sw_model.c
index 17d86c38..91506a49 100644
--- a/src/client/refresh/soft/sw_model.c
+++ b/src/client/refresh/soft/sw_model.c
@@ -482,6 +482,8 @@ Mod_ForName(const char *name, model_t *parent_model, qboolean crash)
 	/* call the apropriate loader */
 	switch (LittleLong(*(unsigned *)buf))
 	{
+		case SDEFHEADER:
+			/* fall through */
 		case MDXHEADER:
 			/* fall through */
 		case DKMHEADER:
diff --git a/src/client/refresh/vk/vk_model.c b/src/client/refresh/vk/vk_model.c
index 150d25c8..307bac46 100644
--- a/src/client/refresh/vk/vk_model.c
+++ b/src/client/refresh/vk/vk_model.c
@@ -458,6 +458,8 @@ Mod_ForName(const char *name, model_t *parent_model, qboolean crash)
 	/* call the apropriate loader */
 	switch (LittleLong(*(unsigned *)buf))
 	{
+		case SDEFHEADER:
+			/* fall through */
 		case MDXHEADER:
 			/* fall through */
 		case DKMHEADER:
diff --git a/src/common/filesystem.c b/src/common/filesystem.c
index 39370dc2..e8f8ad57 100644
--- a/src/common/filesystem.c
+++ b/src/common/filesystem.c
@@ -1150,7 +1150,6 @@ FS_LoadSIN(const char *packPath)
 		files[i].size = LittleLong(info[i].filelen);
 		files[i].compressed_size = 0;
 		files[i].format = PAK_MODE_Q2;
-		printf("sin: %s:%d\n", files[i].name, files[i].size);
 	}
 	free(info);
 
diff --git a/src/common/models.c b/src/common/models.c
index 61008d8a..9c717c8b 100644
--- a/src/common/models.c
+++ b/src/common/models.c
@@ -217,6 +217,7 @@ Mod_LoadFileWithoutExt(const char *namewe, void **buffer, const char* ext)
 	tlen = strlen(namewe);
 
 	if (!strcmp(ext, "fm") ||
+		!strcmp(ext, "def") ||
 		!strcmp(ext, "dkm") ||
 		!strcmp(ext, "md2") ||
 		!strcmp(ext, "md3") ||
@@ -257,6 +258,16 @@ Mod_LoadFileWithoutExt(const char *namewe, void **buffer, const char* ext)
 			return filesize;
 		}
 
+		/* Check SiN model def with include sbm/sam files */
+		Q_strlcpy(newname + tlen, ".def", sizeof(newname));
+		filesize = FS_LoadFile(newname, buffer);
+		if (filesize > 0)
+		{
+			Com_DPrintf("%s: %s loaded as def/sbm/sam (SiN)\n",
+				__func__, namewe);
+			return filesize;
+		}
+
 		/* Check Quake 2 model */
 		Q_strlcpy(newname + tlen, ".md2", sizeof(newname));
 		filesize = FS_LoadFile(newname, buffer);