The thing about Deus Ex is none of the games are bad but will be disappointing if you compare it to the original. The series has excellent level design as just part of it's DNA, which has become a lost art in the age of open world drivel. Even Invisible War is worth playing.

Human Revolution is himbo Deus Ex. The new writers were really desperately trying to be thought provoking but didn't actually have anything to say, leading to the worlds most mixed metaphor with cybernetics. Gameplay is rock solid though and it's visual design is fascinating. Even today it looks good despite being able to run on a potato.