diff --git a/script/6_server-start.sh b/script/6_server-start.sh
index 10d0f71..7629090 100755
--- a/script/6_server-start.sh
+++ b/script/6_server-start.sh
@@ -1,23 +1,37 @@
 #!/bin/bash
 
+#./script.sh          # normal mode
+#./script.sh debug    # debug mode (GDB, timestamped crash logs)
+
+##########################################################################################
+# Toggle debug mode
+##########################################################################################
+DEBUG_MODE=0
+if [[ "$1" == "debug" ]]; then
+    DEBUG_MODE=1
+fi
+
 ##########################################################################################
 # Paths for logs and crash dumps
 ##########################################################################################
 export LOGS_PATH="/tmp/ac/logs"
 export CRASHES_PATH="/tmp/ac/crashes"
 
+# Ensure directories exist
 mkdir -p "$LOGS_PATH" "$CRASHES_PATH"
 
 ##########################################################################################
-# Helper to start a tmux session and run a command
+# Helper: start tmux session and run command
 ##########################################################################################
 start_tmux_session() {
     local session_name=$1
     local command=$2
     local log_file=$3
+    local debug=$4
 
+    # Create session if it doesn't exist
     if tmux has-session -t "$session_name" 2>/dev/null; then
-        echo "Tmux session '$session_name' already exists."
+        echo "Tmux session '$session_name' already exists, attaching command..."
     else
         if tmux new-session -d -s "$session_name"; then
             echo "Created tmux session: $session_name"
@@ -30,53 +44,27 @@ start_tmux_session() {
     # Export environment variables inside tmux
     tmux send-keys -t "$session_name" "export LOGS_PATH=$LOGS_PATH; export CRASHES_PATH=$CRASHES_PATH" C-m
 
-    # Run the command and pipe output to a log file
-    tmux send-keys -t "$session_name" "$command | tee -a $log_file" C-m
-
-    echo "Executed '$command' inside $session_name, logging to $log_file"
+    if [[ "$debug" -eq 1 ]]; then
+        # Timestamped GDB log
+        local gdb_log="$CRASHES_PATH/${session_name}_gdb_$(date +%Y%m%d_%H%M%S).log"
+        tmux send-keys -t "$session_name" "gdb -ex 'set logging file $gdb_log' -ex 'set logging enabled on' -ex 'run' -ex 'bt full' -ex 'quit' --args $command" C-m
+        echo "Debug mode enabled for $session_name, logging to $gdb_log"
+    else
+        # Normal mode: append output to log
+        tmux send-keys -t "$session_name" "$command | tee -a $log_file" C-m
+        echo "Executed '$command' inside $session_name, logging to $log_file"
+    fi
     echo
 }
 
 ##########################################################################################
-# Start authserver normally in tmux
+# Start servers
 ##########################################################################################
-start_tmux_session "$AUTHSERVER_SESSION" "${SERVER_ROOT}/acore.sh run-authserver" "$LOGS_PATH/authserver.log"
+# Authserver (no debug)
+start_tmux_session "$AUTHSERVER_SESSION" "${SERVER_ROOT}/acore.sh run-authserver" "$LOGS_PATH/authserver.log" 0
 
-##########################################################################################
-# Start worldserver under tmux + GDB for crash logging
-##########################################################################################
-WORLDSESSION="$WORLDSERVER_SESSION"
-WORLD_CRASH_LOG="$CRASHES_PATH/worldserver_gdb.log"
-
-# Remove old crash log
-[ -f "$WORLD_CRASH_LOG" ] && rm -f "$WORLD_CRASH_LOG"
-
-# Create worldserver tmux session if needed
-if tmux has-session -t "$WORLDSESSION" 2>/dev/null; then
-    echo "Tmux session '$WORLDSESSION' already exists."
-else
-    if tmux new-session -d -s "$WORLDSESSION"; then
-        echo "Created tmux session: $WORLDSESSION"
-    else
-        echo "Error creating tmux session: $WORLDSESSION"
-        exit 1
-    fi
-fi
-
-# Command to run worldserver under gdb in tmux
-WORLD_CMD="gdb -ex 'set logging file $WORLD_CRASH_LOG' \
-    -ex 'set logging on' \
-    -ex 'run' \
-    -ex 'bt full' \
-    -ex 'quit' \
-    --args ${SERVER_ROOT}/acore.sh run-worldserver"
-
-# Export env + run GDB inside tmux
-tmux send-keys -t "$WORLDSESSION" "export LOGS_PATH=$LOGS_PATH; export CRASHES_PATH=$CRASHES_PATH" C-m
-tmux send-keys -t "$WORLDSESSION" "$WORLD_CMD" C-m
-
-echo "Worldserver started in tmux session '$WORLDSESSION' with GDB crash logging to $WORLD_CRASH_LOG."
-echo "Attach to tmux to see live output: tmux attach -t $WORLDSESSION"
+# Worldserver (toggle debug)
+start_tmux_session "$WORLDSERVER_SESSION" "${SERVER_ROOT}/acore.sh run-worldserver" "$LOGS_PATH/worldserver.log" $DEBUG_MODE
 
 ##########################################################################################
 # Launch interactive menu if needed