diff --git a/engine/debug.go b/engine/debug.go
index d4c4567..a01e5dd 100644
--- a/engine/debug.go
+++ b/engine/debug.go
@@ -1,13 +1,9 @@
 package engine
 
 import (
-	"compress/gzip"
 	"encoding/gob"
-	"errors"
 	"fmt"
 	"math"
-	"os"
-	"time"
 
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
@@ -17,14 +13,9 @@ var (
 	_ Drawer      = PerfDisplay{}
 	_ DrawOrderer = PerfDisplay{}
 	_ Hider       = &PerfDisplay{}
-
-	_ Disabler = &GobDumper{}
-	_ Prepper  = &GobDumper{}
-	_ Updater  = &GobDumper{}
 )
 
 func init() {
-	gob.Register(&GobDumper{})
 	gob.Register(&PerfDisplay{})
 }
 
@@ -76,44 +67,3 @@ func (PerfDisplay) DrawOrder() float64 {
 	// Always draw on top
 	return math.MaxFloat64
 }
-
-// GobDumper waits for a given key combo, then dumps the game into a gob file
-// in the current directory.
-type GobDumper struct {
-	Disabled
-	KeyCombo []ebiten.Key
-
-	game *Game
-}
-
-// Prepare simply stores the reference to the Game.
-func (d *GobDumper) Prepare(g *Game) { d.game = g }
-
-// Update waits for the key combo, then dumps the game state into a gzipped gob.
-func (d *GobDumper) Update() error {
-	if d.Disabled {
-		return nil
-	}
-	for _, key := range d.KeyCombo {
-		if !ebiten.IsKeyPressed(key) {
-			return nil
-		}
-	}
-	if d.game == nil {
-		return errors.New("nil d.game in GobDumper.Update")
-	}
-	f, err := os.Create(time.Now().Format("20060102030405.gob.gz"))
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-	gz := gzip.NewWriter(f)
-	defer gz.Close()
-	if err := gob.NewEncoder(gz).Encode(d.game); err != nil {
-		return err
-	}
-	if err := gz.Close(); err != nil {
-		return err
-	}
-	return f.Close()
-}
diff --git a/main.go b/main.go
index acdb39d..d3c63b1 100644
--- a/main.go
+++ b/main.go
@@ -119,9 +119,6 @@ func main() {
 		Root: &engine.Scene{
 			ID: "root",
 			Components: []interface{}{
-				&engine.GobDumper{
-					KeyCombo: []ebiten.Key{ebiten.KeyControl, ebiten.KeyD},
-				},
 				&engine.Camera{
 					ID:    "game_camera",
 					Scene: &engine.SceneRef{Path: "assets/level1.gobz"},