diff --git a/main.fs b/main.fs
index 657b7e9..23b3a8c 100644
--- a/main.fs
+++ b/main.fs
@@ -47,6 +47,8 @@ create constructcost 0 , 0
 variable constructcount
 \ count-messages-shown contains the amount of device count milestone messages that have been shown.
 variable count-messages-shown
+\ the variable detector-unlocked stores if the metal detector has been unlocked.
+variable detector-unlocked
 \ the variable screen contains the current screen number.
 \ 0 = devices
 \ 1 = garden
@@ -92,9 +94,13 @@ S" you feel like throwing some stuff into the pool." set-message
 	30 devices can-afford? constructcost @ 0= and if
 		40 constructcost ! 
 		S" You figure out that you can probably hack these devices." set-message then ;
-				
+
+: unlock-detector
+	100 devices can-afford? detector-unlocked @ 0= and if
+		-1 detector-unlocked ! then ;
+		
 \ the word unlock tests to see if any unlock conditions are matched, and unlocks them if they are.
-: unlock unlock-members unlock-constructs ;
+: unlock unlock-members unlock-constructs unlock-detector ;
 
 \ the word wait-tick waits a tick. Ticks are 1ms currently.
 : wait-tick   1 ms ; 
@@ -159,6 +165,10 @@ S" you feel like throwing some stuff into the pool." set-message
 		clear-message
 		then ;
 		
+\ the word buy-detector buys the metal detector!
+: buy-detector
+	400 devices can-afford? if
+		1 screens +! then ;
 
 \ DEBUGGING STUFF
 
@@ -188,6 +198,7 @@ S" you feel like throwing some stuff into the pool." set-message
 	case
 	[char] h of hire-chat-member endof
     [char] b of build-construct endof 
+    [char] g of buy-detector endof
     endcase ;
 
 \ the word handle-input handles input every time around the game loop.
@@ -276,11 +287,17 @@ S" you feel like throwing some stuff into the pool." set-message
 	else drop then 
 	inc-y ;
 
+: draw-detector ( x y -- x y )
+	detector-unlocked @ screens @ 0= and if 
+		." (g)o metal detecting! [400 Devices]"
+	then inc-y ;
+
 \ draw-actions draws a list of the actions you've unlocked.
 : draw-actions ( x y -- x y )
 	2dup at-xy
 	draw-members cr over move-right
 	draw-constructs cr over move-right
+	draw-detector cr over move-right
 	." (q)uit (without saving)"
 	\ add 1 to y
 	inc-y ;