diff --git a/game/achievements.rpy b/game/achievements.rpy
index 5dbed7f..93f54a7 100644
--- a/game/achievements.rpy
+++ b/game/achievements.rpy
@@ -137,6 +137,14 @@ define hedgehog_dilemma_solved = Achievement(
     hidden=True,
 )
 
+define retroactive = Achievement(
+    name=_("Retroactive"),
+    id="retroactive",
+    description=_("You embraced change."),
+    locked_image=Transform("gui/window_icon.png", matrixcolor=SepiaMatrix()),
+    unlocked_image=Transform("gui/window_icon.png", matrixcolor=SepiaMatrix()),
+    hidden=True,
+)
 
 # ## Replace this with whatever locked image you want to use as the default
 # ## for a locked achievement.
diff --git a/game/script.rpy b/game/script.rpy
index d0ca052..fd91db0 100644
--- a/game/script.rpy
+++ b/game/script.rpy
@@ -31,7 +31,7 @@ label start:
         # 4 means exam onwards
         day = 0
 
-        attacked_student = false
+        attacked_student = False
 
     label presentation_begins:
         # TODO
@@ -572,6 +572,7 @@ label ending:
     # $ she_has_your_back.grant()
     # $ they_have_your_back.grant()
     # $ hedgehog_dilemma_solved.grant()
+    # $ retroactive.grant()
 
     show screen ending_gallery