diff --git a/lib/file_system.c b/lib/file_system.c
index f476b29..21ac3b2 100644
--- a/lib/file_system.c
+++ b/lib/file_system.c
@@ -86,7 +86,12 @@ int file_truncate(Handle fd, size_t new_size)
 #endif
 
 #ifdef _WIN32
-    return -1; // TODO: Not implemented
+    DWORD result = SetFilePointer((HANDLE) fd.data, (LONG) new_size, NULL, FILE_BEGIN);
+    if (result == INVALID_SET_FILE_POINTER)
+        return -1;
+    if (!SetEndOfFile((HANDLE) fd.data))
+        return -1;
+    return 0;
 #endif
 }
 
diff --git a/quakey/include/quakey.h b/quakey/include/quakey.h
index d8fb57f..737bd15 100644
--- a/quakey/include/quakey.h
+++ b/quakey/include/quakey.h
@@ -123,11 +123,13 @@ int   mock_ioctlsocket(SOCKET fd, long cmd, unsigned long *argp);
 BOOL   mock_QueryPerformanceCounter(LARGE_INTEGER *lpPerformanceCount);
 BOOL   mock_QueryPerformanceFrequency(LARGE_INTEGER *lpFrequency);
 HANDLE mock_CreateFileW(WCHAR *lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile);
+DWORD  mock_GetFileAttributesA(char *lpFileName);
 BOOL   mock_CloseHandle(HANDLE handle);
 BOOL   mock_ReadFile(HANDLE handle, char *dst, DWORD len, DWORD *num, OVERLAPPED *ov);
 BOOL   mock_WriteFile(HANDLE handle, char *src, DWORD len, DWORD *num, OVERLAPPED *ov);
 BOOL   mock_GetFileSizeEx(HANDLE handle, LARGE_INTEGER *buf);
 DWORD  mock_SetFilePointer(HANDLE hFile, LONG lDistanceToMove, PLONG lpDistanceToMoveHigh, DWORD dwMoveMethod);
+BOOL   mock_SetEndOfFile(HANDLE hFile);
 BOOL   mock_LockFile(HANDLE hFile, DWORD dwFileOffsetLow, DWORD dwFileOffsetHigh, DWORD nNumberOfBytesToLockLow, DWORD nNumberOfBytesToLockHigh);
 BOOL   mock_UnlockFile(HANDLE hFile, DWORD dwFileOffsetLow, DWORD dwFileOffsetHigh, DWORD nNumberOfBytesToUnlockLow, DWORD nNumberOfBytesToUnlockHigh);
 BOOL   mock_FlushFileBuffers(HANDLE handle);
@@ -199,6 +201,7 @@ void  mock_free(void *ptr);
 #define close            mock_close
 #define ftruncate        mock_ftruncate
 #define CreateFileW      mock_CreateFileW
+#define GetFileAttributesA mock_GetFileAttributesA
 #define CloseHandle      mock_CloseHandle
 #define ReadFile         mock_ReadFile
 #define WriteFile        mock_WriteFile
@@ -208,6 +211,7 @@ void  mock_free(void *ptr);
 #define GetFileSizeEx    mock_GetFileSizeEx
 #define lseek            mock_lseek
 #define SetFilePointer   mock_SetFilePointer
+#define SetEndOfFile     mock_SetEndOfFile
 #define flock            mock_flock
 #define LockFile         mock_LockFile
 #define UnlockFile       mock_UnlockFile
diff --git a/quakey/src/quakey.c b/quakey/src/quakey.c
index 9f1d0c3..dddedb6 100644
--- a/quakey/src/quakey.c
+++ b/quakey/src/quakey.c
@@ -4371,6 +4371,25 @@ HANDLE mock_CreateFileW(WCHAR *lpFileName,
     return (HANDLE)(long long)desc_idx;
 }
 
+DWORD mock_GetFileAttributesA(char *lpFileName)
+{
+    Host *host = host___;
+    if (host == NULL)
+        abort_("Call to mock_GetFileAttributesA() with no node scheduled\n");
+
+    // Try opening the file read-only to check existence
+    int ret = host_open_file(host, lpFileName, MOCKFS_O_RDONLY);
+    if (ret < 0) {
+        *host_errno_ptr(host) = ERROR_FILE_NOT_FOUND;
+        return INVALID_FILE_ATTRIBUTES;
+    }
+
+    // File exists — close it and return normal attributes
+    host_close(host, ret, false);
+    *host_errno_ptr(host) = ERROR_SUCCESS;
+    return FILE_ATTRIBUTE_NORMAL;
+}
+
 BOOL mock_CloseHandle(HANDLE handle)
 {
     Host *host = host___;
@@ -4574,6 +4593,45 @@ DWORD mock_SetFilePointer(HANDLE hFile, LONG lDistanceToMove, PLONG lpDistanceTo
     return (DWORD)(new_pos & 0xFFFFFFFF);
 }
 
+BOOL mock_SetEndOfFile(HANDLE hFile)
+{
+    Host *host = host___;
+    if (host == NULL)
+        abort_("Call to mock_SetEndOfFile() with no node scheduled\n");
+
+    if (hFile == INVALID_HANDLE_VALUE || hFile == NULL) {
+        *host_errno_ptr(host) = ERROR_INVALID_HANDLE;
+        return 0;  // FALSE
+    }
+
+    int desc_idx = (int)(long long)hFile;
+
+    // Get current file position to use as the new size
+    int cur_pos = host_lseek(host, desc_idx, 0, HOST_SEEK_CUR);
+    if (cur_pos < 0) {
+        *host_errno_ptr(host) = ERROR_INVALID_HANDLE;
+        return 0;  // FALSE
+    }
+
+    int ret = host_ftruncate(host, desc_idx, cur_pos);
+    if (ret < 0) {
+        switch (ret) {
+        case HOST_ERROR_BADIDX:
+            *host_errno_ptr(host) = ERROR_INVALID_HANDLE;
+            return 0;
+        case HOST_ERROR_NOSPC:
+            *host_errno_ptr(host) = ERROR_DISK_FULL;
+            return 0;
+        default:
+            *host_errno_ptr(host) = ERROR_INVALID_PARAMETER;
+            return 0;
+        }
+    }
+
+    *host_errno_ptr(host) = ERROR_SUCCESS;
+    return 1;  // TRUE
+}
+
 BOOL mock_GetFileSizeEx(HANDLE handle, LARGE_INTEGER *buf)
 {
     Host *host = host___;