True Laboratory is an optional area in Undertale, following the boss battle ... lobby at the end of the corridor you'll encounter a locked door; there are four keys needed to open it, so start ...

Snowdin is the second area of Undertale, following on from The Ruins ... and head south to a dead end area with a mysterious door... As you explore Snowdin, towards the end you'll come to a ...

IGN's Undertale cheats and secrets guide ... more pieces of info about San's history. Cave Room in Snowdin == SnowdinWondered what the door which is in that cave in Snowdin? Well follow the ...