diff --git a/examples/fullscreen/main.go b/examples/fullscreen/main.go
index f703d945b..9275648a8 100644
--- a/examples/fullscreen/main.go
+++ b/examples/fullscreen/main.go
@@ -127,7 +127,7 @@ func main() {
 
 	ebiten.SetFullscreen(true)
 	ebiten.SetWindowTitle("Fullscreen (Ebiten Demo)")
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		log.Fatal(err)
 	}
 }
diff --git a/examples/keyboard/keyboard/gen.go b/examples/keyboard/keyboard/gen.go
index 07ff3fe8d..34ab006ae 100644
--- a/examples/keyboard/keyboard/gen.go
+++ b/examples/keyboard/keyboard/gen.go
@@ -340,7 +340,7 @@ func (g *game) Layout(outw, outh int) (int, int) {
 
 func main() {
 	g := &game{}
-	if err := ebiten.RunGame(g); err != regularTermination {
+	if err := ebiten.RunGame(g); err != nil && !errors.Is(err, regularTermination) {
 		log.Fatal(err)
 	}
 	if err := outputKeyRectsGo(g.rects); err != nil {
diff --git a/examples/spriteshd/main.go b/examples/spriteshd/main.go
index f95866b23..0e2718e9e 100644
--- a/examples/spriteshd/main.go
+++ b/examples/spriteshd/main.go
@@ -202,7 +202,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 func main() {
 	ebiten.SetFullscreen(true)
 	ebiten.SetWindowTitle("Sprites HD (Ebiten Demo)")
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		log.Fatal(err)
 	}
 }
diff --git a/examples/windowclosing/main.go b/examples/windowclosing/main.go
index b51d54c38..84d701623 100644
--- a/examples/windowclosing/main.go
+++ b/examples/windowclosing/main.go
@@ -62,7 +62,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 func main() {
 	ebiten.SetWindowClosingHandled(true)
 	ebiten.SetWindowTitle("Window Closing (Ebiten Demo)")
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		log.Fatal(err)
 	}
 }
diff --git a/internal/buffered/image_test.go b/internal/buffered/image_test.go
index f2c9d66ca..3f2189519 100644
--- a/internal/buffered/image_test.go
+++ b/internal/buffered/image_test.go
@@ -73,7 +73,7 @@ func TestMain(m *testing.M) {
 		m:     m,
 		endCh: endCh,
 	}
-	if err := ebiten.RunGame(g); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(g); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 
diff --git a/internal/processtest/testdata/issue1753.go b/internal/processtest/testdata/issue1753.go
index 249c2331a..7850b7e54 100644
--- a/internal/processtest/testdata/issue1753.go
+++ b/internal/processtest/testdata/issue1753.go
@@ -108,7 +108,7 @@ func (g *Game) Layout(width, height int) (int, int) {
 }
 
 func main() {
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2079.go b/internal/processtest/testdata/issue2079.go
index 93b465937..ef0ffc86a 100644
--- a/internal/processtest/testdata/issue2079.go
+++ b/internal/processtest/testdata/issue2079.go
@@ -62,7 +62,7 @@ func (g *Game) Layout(width, height int) (int, int) {
 }
 
 func main() {
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2089.go b/internal/processtest/testdata/issue2089.go
index de77d6da9..7c9bad6a4 100644
--- a/internal/processtest/testdata/issue2089.go
+++ b/internal/processtest/testdata/issue2089.go
@@ -72,7 +72,7 @@ func (g *Game) Layout(width, height int) (int, int) {
 }
 
 func main() {
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2129.go b/internal/processtest/testdata/issue2129.go
index ceaf0bb60..c3e9cad9b 100644
--- a/internal/processtest/testdata/issue2129.go
+++ b/internal/processtest/testdata/issue2129.go
@@ -64,7 +64,7 @@ func (g *Game) Layout(width, height int) (int, int) {
 }
 
 func main() {
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2154_1.go b/internal/processtest/testdata/issue2154_1.go
index cee3c6168..a4e94a59a 100644
--- a/internal/processtest/testdata/issue2154_1.go
+++ b/internal/processtest/testdata/issue2154_1.go
@@ -115,7 +115,7 @@ func (g *Game) Layout(width, height int) (int, int) {
 }
 
 func main() {
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2154_2.go b/internal/processtest/testdata/issue2154_2.go
index acd8e796f..dce964e6a 100644
--- a/internal/processtest/testdata/issue2154_2.go
+++ b/internal/processtest/testdata/issue2154_2.go
@@ -86,7 +86,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 func main() {
 	ebiten.SetWindowTitle("Test")
 
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2162.go b/internal/processtest/testdata/issue2162.go
index 619f1d9c2..2d40ccdf6 100644
--- a/internal/processtest/testdata/issue2162.go
+++ b/internal/processtest/testdata/issue2162.go
@@ -59,7 +59,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 
 func main() {
 	// Run a game loop at least for one frame to ensure the shader disposed.
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/processtest/testdata/issue2182.go b/internal/processtest/testdata/issue2182.go
index a2d95b611..bcb7f1654 100644
--- a/internal/processtest/testdata/issue2182.go
+++ b/internal/processtest/testdata/issue2182.go
@@ -87,7 +87,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 func main() {
 	ebiten.SetWindowTitle("Test")
 
-	if err := ebiten.RunGame(&Game{}); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(&Game{}); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 }
diff --git a/internal/testing/testing.go b/internal/testing/testing.go
index fb32284e3..6b1071353 100644
--- a/internal/testing/testing.go
+++ b/internal/testing/testing.go
@@ -46,7 +46,7 @@ func MainWithRunLoop(m *testing.M) {
 	g := &game{
 		m: m,
 	}
-	if err := ebiten.RunGame(g); err != nil && err != regularTermination {
+	if err := ebiten.RunGame(g); err != nil && !errors.Is(err, regularTermination) {
 		panic(err)
 	}
 	os.Exit(g.code)
diff --git a/run.go b/run.go
index 4104403de..1f2e73c46 100644
--- a/run.go
+++ b/run.go
@@ -183,8 +183,10 @@ func (i *imageDumperGame) Layout(outsideWidth, outsideHeight int) (screenWidth,
 // TPS (ticks per second) is 60 by default.
 // This is not related to framerate (display's refresh rate).
 //
-// RunGame returns error when 1) error happens in the underlying graphics driver, 2) audio error happens or
-// 3) f returns error. In the case of 3), RunGame returns the same error.
+// RunGame returns error when 1) an error happens in the underlying graphics driver, 2) an audio error happens
+// or 3) f returns an error. In the case of 3), RunGame returns the same error so far, but it is recommended to
+// use errors.Is when you check the returned error is the error you want, rather than comparing the values
+// with == or != directly.
 //
 // The size unit is device-independent pixel.
 //