Serial Experiments Lain, Steins;Gate Recommendations
Both series are very computer oriented. They also explore the concept of time manipulation and time traveling.
by pushing the envelope of the mind set of reality.
Both have the same strange and eerie atmosphere, although Lain is decidedly stranger. Lain is not about time travel, but it has the same "Matrix" feel to it. They are both crazy good, and Lain hits the ground running while Steins;Gate started a bit slower. Lain is a must watch.
Steins;Gate has a more traditional narrative structure compared to Serial Experiments Lain, but there are some notable similarities. Firstly, the cinematography and mise-en-scene of Steins;Gate takes great influence from Serial Experiments Lain (notably in terms of lighting and sound). Beyond that, both shows explore humanity's relationship with technology in science fiction terms.
Shows both about a philosophical subject.
One about time travel, the other about the existence of humans.
I love both of these series and both of them are on my favorite list, (however, I think Serial Experiments Lain is better, just more confusing if you don't know basic philosophical theories.)
Have fun, if you chose to watch it.