Secrets, easter eggs and hidden boss fights in Undertale!
With commentary / reactions.

0:27 No Hit Credits
3:18 Snowdin Door
6:00 So Sorry
13:27 Glyde
17:42 Legendary Artifact
21:05 Mettaton's House
24:48 Aaron and Woshua
25:52 Sans' Secret Room

Play the game yourself!
http://store.steampowered.com/app/391540

Undertale is an awesome game made by Toby Fox. It is an RPG with bullet hell and avoidance elements and has a heavy focus on choices and their consequences.

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Allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research.