In space, no one can hear you scream now.

Well, people adjacent to you can. And people on radio...
Seems kinda pointless now that I think about it, but eh.

code/modules/mob/living/say.dm

@@ -1,4 +1,4 @@
-
+#define SAY_MINIMUM_PRESSURE 10
 var/list/department_radio_keys = list(
 	  ":r" = "right hand",
 	  ":l" = "left hand",
@@ -295,6 +295,13 @@ var/list/department_radio_keys = list(
 				italics = 1
 /////SPECIAL HEADSETS END
 
+	var/datum/gas_mixture/environment = loc.return_air()
+	if(environment)
+		var/pressure = environment.return_pressure()
+		if (pressure < SAY_MINIMUM_PRESSURE)	//in space no one can hear you scream
+			italics = 1
+			message_range = 1
+
 	var/list/listening
 
 	listening = get_mobs_in_view(message_range, src)