@Jo Pereira: Yeah it does But, you can make the (insert mech here) from (favorite game/tvshow/anime here) and it actually works! ᴶᵘˢᵗ ᵐᵃᵏᵉ ˢᵘʳᵉ ᵗᵒ ᵃᵈᵈ ᵃᶰᵗᶦ ᵐᶦˢˢᶫᵉ ᵃᶰᵈ ᵃᵈᵈ ˢʰᶦᵉᶫᵈˢ ᵗᵒ ᶦᵗ

It harvests enemy's parts, of course.

@Jo Pereira: They do turn out like that with smaller creation, but once you get into the bigger ones... they start to look really good. Look up “Pilkington Fleet” on YouTube. You may like this one ship - the HMS Ragnarök.

@Stanislav Evseev: Was login only to reply the same. Although be ready for some grinding and a questionable cash market (no, not cash shop).

Try Crossout. Spending two hours, playing post-apocaliptic LEGO with guns, wheels, chainsaws etc, then your trashcan being disassembled in first 20 seconds. It's really fun.

@Beastwolf: I googled From the Depths and honestly while it may be deep it is also a bit on the ugly side. Your vehicles end up with that Minecraft look which is kind of a turn off.

Does the game really not have a notable npc that comments on your actions?

If you want a game where you design vehicles to have specific roles I recommend from the depths, the only issue is that actually designing your own stuff is a little complex but worst case download stuff from steam workshop.
Also the early access jank that comes with all early access games.

"Use more gun."