diff --git a/deerith_engine_core/include/deerith/engine.h b/deerith_engine_core/include/deerith/engine.h
index c149b95..10460ec 100644
--- a/deerith_engine_core/include/deerith/engine.h
+++ b/deerith_engine_core/include/deerith/engine.h
@@ -1,4 +1,10 @@
 #pragma once
+#include <cstdint>
+
+// At
+#define UNIVERSE_SIMULATION_TICK_FREQ 50
+#define NETWORK_RELATIVE_UNIVERSE_TICK 2
+#define NETWORK_DELAY 6
 
 namespace deerith
 {