diff --git a/bc/Debug.cpp b/bc/Debug.cpp
new file mode 100644
index 0000000..e120a81
--- /dev/null
+++ b/bc/Debug.cpp
@@ -0,0 +1,11 @@
+#include "bc/Debug.hpp"
+
+void Blizzard::Debug::Assert(const char* a1, const char* a2, uint32_t a3) {
+    if (System_Debug::s_assertCallback) {
+        System_Debug::s_assertCallback(a1, "", a2, a3);
+    }
+}
+
+void Blizzard::Debug::SetAssertHandler(Blizzard::System_Debug::AssertCallback callback) {
+    System_Debug::s_assertCallback = callback;
+}
diff --git a/bc/Debug.hpp b/bc/Debug.hpp
new file mode 100644
index 0000000..f88e04c
--- /dev/null
+++ b/bc/Debug.hpp
@@ -0,0 +1,29 @@
+#ifndef BC_DEBUG_HPP
+#define BC_DEBUG_HPP
+
+#include "bc/System_Debug.hpp"
+#include <cstdint>
+
+#if defined(NDEBUG)
+#define BLIZZARD_ASSERT(x) \
+    if (!(x)) {            \
+        return 0;          \
+    }
+#else
+#define BLIZZARD_ASSERT(x)                               \
+    if (!(x)) {                                          \
+        Blizzard::Debug::Assert(#x, __FILE__, __LINE__); \
+    }
+#endif
+
+namespace Blizzard {
+namespace Debug {
+
+// Functions
+void Assert(const char* a1, const char* a2, uint32_t a3);
+void SetAssertHandler(Blizzard::System_Debug::AssertCallback callback);
+
+} // namespace Debug
+} // namespace Blizzard
+
+#endif
diff --git a/bc/System_Debug.cpp b/bc/System_Debug.cpp
new file mode 100644
index 0000000..485c453
--- /dev/null
+++ b/bc/System_Debug.cpp
@@ -0,0 +1,3 @@
+#include "bc/System_Debug.hpp"
+
+Blizzard::System_Debug::AssertCallback Blizzard::System_Debug::s_assertCallback;
diff --git a/bc/System_Debug.hpp b/bc/System_Debug.hpp
new file mode 100644
index 0000000..1a0e5a0
--- /dev/null
+++ b/bc/System_Debug.hpp
@@ -0,0 +1,18 @@
+#ifndef BC_SYSTEM_DEBUG_HPP
+#define BC_SYSTEM_DEBUG_HPP
+
+#include <cstdint>
+
+namespace Blizzard {
+namespace System_Debug {
+
+// Types
+typedef void (*AssertCallback)(const char*, const char*, const char*, uint32_t);
+
+// Variables
+extern AssertCallback s_assertCallback;
+
+} // namespace System_Debug
+} // namespace Blizzard
+
+#endif