system
Given the following post, respond as if you're commenting on Reddit:
human
[General SciFi] Why don’t mechs sink into the ground?

The bigger you build something the bigger it gets. With a bipedal system all that weight is concentrated on two legs. This creates the stiletto effect. When a woman puts on a pair of heels those heels have the ability to punch through a great deal of material. The Germans had the same problem with their Maus tank. As soon as they took it out into the field it sunk. If an 188 tonnes tank that has a wide foundation and low profile sinks into the ground a mech definitely would.
gpt
A major focus on early mech designs was to spread out the weight as much as possible, which was done by giving the mechs *massive* feet in proportion to the rest of the body. See Gundam and the Transformers as an example of this from the 80's and 90's.

This is also a plot point in the Metal Gear series; the first two Metal Gear units (from the MSX games) were chicken walkers which were defeated by Snake putting bombs at their feet, which toppled the mechs. But when Metal Gear REX (from the PS1 game) was developed, it went with a larger leg design which also heavily reinforced the feet, rendering it immune to such a strategy. Snake had to use a deliberate flaw added by Otacon in order to defeat it.