Download size

How many GB is Undertale?

0.2 GB

That makes it bigger than 12% of Puzzle games we have measured.

The median Puzzle game needs 1 GB; the largest tenth start at 10 GB.

Leave at least 6 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

A small child falls into the Underground, where monsters have long been banished by humans and are hunting every human that they find. The player controls the child as they try to make it back to the Surface through hostile environments, all the while engaging with a turn-based combat system with puzzle-solving and bullet hell elements, as well as other unconventional game mechanics.