diff --git a/Shared/Debug.cs b/Shared/Debug.cs
index b89c672..7fce50b 100644
--- a/Shared/Debug.cs
+++ b/Shared/Debug.cs
@@ -14,8 +14,21 @@ namespace SemiColinGames {
       }
     }
 
+    struct DebugLine {
+      public Point start;
+      public Point end;
+      public Color color;
+
+      public DebugLine(Point start, Point end, Color color) {
+        this.start = start;
+        this.end = end;
+        this.color = color;
+      }
+    }
+         
     public static bool Enabled;
     static List<DebugRect> rects = new List<DebugRect>();
+    static List<DebugLine> lines = new List<DebugLine>();
     static Texture2D whiteTexture;
     static string toast = null;
 
@@ -38,12 +51,17 @@ namespace SemiColinGames {
     
     public static void Clear() {
       rects.Clear();
+      lines.Clear();
     }
 
     public static void AddRect(Rectangle rect, Color color) {
       rects.Add(new DebugRect(rect, color));
     }
 
+    public static void AddLine(Point start, Point end, Color color) {
+      lines.Add(new DebugLine(start, end, color));
+    }
+
     public static void DrawToast(SpriteBatch spriteBatch, SpriteFont font) {
       if (toast == null) {
         return;
diff --git a/Shared/SneakGame.cs b/Shared/SneakGame.cs
index 646b85b..325432d 100644
--- a/Shared/SneakGame.cs
+++ b/Shared/SneakGame.cs
@@ -114,7 +114,7 @@ namespace SemiColinGames {
       // Draw foreground tiles.
       world.Draw(spriteBatch, camera);
 
-      // Draw debug rects.
+      // Draw debug rects & lines.
       Debug.Draw(spriteBatch, camera);
 
       // Aaaaand we're done.