They aren't totally impervious, but yeah, they mostly work pretty well. As metallurgy made better steel, we kinda came full circle with trauma plates in carriers and ballistic shields too, they pretty reliably stop most small arms.
Now I'm wondering how modern armor would do against something like an English longbow.









Sure it does: Portal, Ratchet and Clank, Psychonauts, Drake's Fortune, Qube, Beton Brutal, Sonic Generations, Neon White, Mirror's Edge, Tomb Raider, Grimhook, Spyro, Crash Bandicoot, Little Big Planet, Fotonica, Alice, Fallstruktur, Try Again
This is by no means comprehensive, but if you're looking for 3D platformers, the above games/series are worth a look!