If you liked the Steins;Gate anime, the Anime-Planet community thinks you'd like:
In Gintoki's Japan, the arrival of the various space races known collectively as the Amanto ended the era of the samurai. The Amanto's highly advanced technology resulted in total conquest and a severe economic shift. Now, former samurai such as Gintoki scrape together whatever livelihood they can. Gintoki's profession of choice is that of a yorozuya: he'll complete any job for money. However, he’s unmotivated; and spending most of the day on the couch with the latest issue of Jump and a carton of Strawberry Milk is his preferred pastime. It turns out that his new unpaid employees, Shinpachi and Kagura, are going to interfere with his pastime even more than with his "work"! Of course, none of this means he has really given up on his samurai ideologies!
The normally sleepy town of Inaba has recently fallen prey to a string of bizarre deaths, where the deceased are discovered dangling from TV antennae and telephone poles. But that’s not the only mystery that’s cropped up lately: the "Midnight Channel" has gained notoriety in the local high school for allegedly revealing a person's soul-mate to them. When transfer student Yu arrives in town, he quickly becomes enmeshed in the center of all these mysterious goings-on, especially after the teen and his friends are pulled through the television into another world! How is this strange place connected with the other mysteries plaguing Inaba?
Although the games that both shows are based on aren't too similar, both Steins;Gate and Persona 4 are excellent examples of video game adaptations done right. Neither feel too bogged down in a video game style pacing, but don't jettison everything and start from scratch either.
Plotwise, both revolve around high school age students engaged in a mystery with science fiction/fantasy elements, and have a likable cast of characters. Both shows also manage to balance light-hearted elements with the darker mystery, and strike a very similar tone.
In an experimental city of despair and carnage, ORGAN will do anything necessary to gain power and wealth. Unfortunately for one underground boxer who was mutilated, a rogue doctor has given him what ORGAN specializes in and he despises: Texhnolyze body parts. Will these cybernetic appendages help exact his revenge upon the one who made him this way?
Touma Kamijo's right hand has the ability to nullify any form of supernatural power, whether it be magical, psychic, or divine; he lives in a city populated by students with these powers. Yet unfortunately for Touma, his arm also seems to nullify good luck. Despite his bad luck, the boy tries to stay out of trouble and just live out his life, trying to be the "good guy" whenever he can; but trouble enters his life one day when he finds a young girl hanging on his balcony. She turns out to be a nun of the Church of England, bearing the Index-Librorum-Prohibitorum - a collection of 103,000 forbidden texts, and as a result has a number of people after her. How far will Touma go to protect his new companion from her pursuers?
I really think there is a similarity between ACMI and Steins;Gate. They're both Sci-Fi and really cool. Really though, in my opinion, nothing can match Steins;Gate's storyline, connection with characters and on top of being a Thriller/Psychological, they've thrown in some comedy too. Much like ACMI. I just think that if you liked Steins;Gate, you'd probably like ACMI.
A man is miserable. Despite all his dreams of a “Rose-Colored Campus Life” filled with raven-haired maidens who dote on him, his social life is going nowhere. He has no girlfriend, his only good friend keeps getting him into trouble, and the circle he joined brings him no joy. So he tries again, and again, reliving his first two years of college life ad nauseum, making different decisions each time, having no recollection that he’s already done this all before. Will the man ever be satisfied with how his life turns out?
Both deal with alternate realities and "would have, could haves," yet the protagonist seemingly keeps coming up with the same result albeit through very different pathways.
If you enjoyed the exposition of the possiblilities in one you will like the other.