Update code/game/gamemodes/revolution/revolution.dm (#7686)

code/game/gamemodes/revolution/revolution.dm

@@ -26,6 +26,7 @@
 	var/finished = 0
 	var/check_counter = 0
 	var/max_headrevs = 3
+	var/completioncheckstart
 	var/datum/team/revolution/revolution
 	var/list/datum/mind/headrev_candidates = list()
 	var/end_when_heads_dead = TRUE
@@ -61,6 +62,8 @@
 		setup_error = "Not enough headrev candidates"
 		return FALSE
 
+	completioncheckstart = world.time + 20 MINUTES
+
 	return TRUE
 
 /datum/game_mode/revolution/post_setup()
@@ -114,7 +117,7 @@
 /datum/game_mode/revolution/process()
 	check_counter++
 	if(check_counter >= 5)
-		if(!finished)
+		if(!finished && world.time >= completioncheckstart)
 			SSticker.mode.check_win()
 		check_counter = 0
 	return FALSE