added more info

Author: Drwhomust

topics/undertale/index.md

@@ -1,10 +1,13 @@
 ---
 display_name: Undertale
 topic: undertale
+created_by: Toby Fox
 aliases: UT, under-tale
 related: video-game, role-playing-game, rpg, deltarune, gamemaker, bullet-hell
 short_description: Undertale is a video game created by Toby Fox
 wikipedia_url: https://en.wikipedia.org/wiki/Undertale
+released: 9/2015
+url: https://undertale.com/
 ---
 Undertale is a video game by Toby Fox. Released in 2015, The game is about
 the player controlling a small child who fell into a pit near mount ebott.