
Wow, where to begin? This game took me for an insane ride. I honestly don't know where to start. I don't usually waste my time too much with primarily narrative games. Games like Discworld and Broken Sword always eluded me, as they were too slow and the payoff never seemed to be there for me no matter how many hours I tried to pour into it. 13 Sentinels though, holds a very special place in my heart. I have added it to my shelf of extremely respected games dubbed "The Mantle of Awesome", and so it sits beside things such as Earthbound, Zone of Enders 2: The 2nd Runner, and Ghost Trick.
Sadly, this is one of those games that you just cant talk about without giving everything away, so for the first section of this review i will talk about the mechanics of the game and be very loose in reference to how things work, and then later I'll be a bit more specific.
Suffice it to say, if you aren't into primarily visual novel style games, you might not enjoy this game. There are battles, symbolized by little voxel style units and highly detailed attack animations, but since Vanillaware (One of my favorite game companies) spent the majority of their budget on the voice acting and the art, you can tell as you play this that they cut a few corners on the battle system that is integrated into this game. That doesn't mean its not good! A lot of great things have been invented because of a lack of money. (Just look at Star Wars : A New Hope). It's not about resources, its about resourcefulness.
The battle system is still very fun and challenging. It's sort of like an ATB system (Active Time Battle System) wherein you are given a chance to pause the action at any given time and then issue orders to your units, and then continue the flow of time. The units are represented by little voxel style animations. There is no grid, but units do have to follow the line of the streets and each city and battle has a different layout, though flying units have free reign and can move in any direction as far as their circular range meter allows them to. The animations for the attacks are all very descriptive, but you dont actually see these actions take place, but the symbols for the units interacting with each other to signify the attack. (Sort of like Fire Emblem). This does a very cool thing, since the animation for the attack is so detailed, you sort of imagine how the attack would carry out against the units. It works quite well, and saves the studio from having to animate the attack effect on every unit.
It wouldnt have worked any other way anyhow, as during any given battle you go up against thousands of units. So i understand why they went this route, because otherwise it would have cost a fortune to make.
As for the story, you get it in little pieces. Each character knows a little bit of what is going on, and its up to you to use your aggregate knowledge playing with all 13 sentinel pilots in order to uncover whats going on within this world, what someone is doing and how to stop them (or even if you should, or even if you have a chance!)
The way the story unfolds is like something out of the greatest mystery novel ever written. You get snippets of time, back and forth, in between all of the characters, and your understanding of whats going on and how things function in the universe grows exponentially, over and over again. It's a thrilling narrative rollercoaster that I would recommend to anyone!
I dont think i could possibly talk about the game anymore with out giving at least some of it away. This marks the section of the review that will contain spoiler content, so please be advised. I will not mention details that are too specific, but some story elements will be given away. You've been warned.

Let me just say, that there is pretty much no one here on the cast that i don't like. All of the characters definitely have their own wonderful personalities, and their motivations never give me pause to question whether or not they are properly tied in with the storyline and make sense. My favorites being Yuki and Hijiyama. Yuki's assertiveness to help her friends is so friggen admirable, and the way Hijiyama is such a stand-up himbo, he's just too cool! Nevermind being awesome enough to just straight up fall in love with someone whether or not they are a boy or a girl or even a robot.
Ok, real spoiler talk. I love robots. I want to be one, I would totally fall in love with one, and I will watch stuff about robots all day everyday. The story of Keitaro implanting himself into a tiny scout robot and then helping the characters in a later world reset was awesome, and when he died on the bridge I legit cried.
Kisaragi is a bit OP, seeing as how he/she/they always knows whats going on. The same goes for Renya Gouto. You don't get the majority of their content until way late in the game, because they uncover so much and what's happening within the world has to be a slow burn. Though I do really enjoy their characters, they remind me a lot of Death Note's L and Light.
The ending really made me smile, because every loose end gets tied up. All of the versions of every character gets to find some semblance of peace. They even bring back the lovely moe Miwako, who is technically not real. No one is except for the 13 Sentinel pilots. But hearing them say they are working on a way to materialize the digital versions of the people in the world gives me a bit of hope. It also ends in such a way that makes it like... the bad guys weren't really bad guys all this time, they were really trying to help in their own way.
This is a reminder for myself, in case I forget, just like all of the reviews I post are really just me trying to remind myself "Hey, you played this... you beat it". Anyways, the gist of the story is that everyone is living out in these space stations that are made to look like different periods of time, so when they travel from one station to another they aren't actually traveling backwards or forwards in time. The main goal of the space stations is to prepare the sentinel pilots for waking up and recolonizing the universe. Something happened a long time ago that infected all of mankind with a type of virus that ended up killing everyone, and the space station is actually like a seed for mankind to grow back and prosper again. The worlds get "reset" everytime the kaiju robots come and destroy all of the space stations. The characters are all actual reincarnated versions of previous people from way in the future (technically, way way in the past). Once Ms. Morimura switches bodies and talks to Renya at the park, that's when the whole can of beans gets spilled. It turns out, the space stations themselves aren't even real, they are digital. So resetting the world isn't actually a physical ordeal, all the destruction of the towns and the people are actually just ones and zeroes. Each reset has been to prevent the growth of the virus that also previously ravages mankind from the previous genocide in the future. Renya convinces her to let all of the pilots play out this last reset in order to finally defeat the algorithm that is set to keep them there. ALL of the battles that are happening in the game are actually taking place right at the end of the entire story. Once the team beat the final battle of the kaiju, they are all able to escape into the real world and begin colonizing and repopulating the stations and eventually the universe.
A funny bit, is that there is some worry about the civilians during the battle campaign. But since nothing there is real, it doesn't actually matter how many civilians die. But, being the wholesome crew that they are, they still thought it was important to save the lives of their family and friends. It must be a weird feeling, to find out that your mother and father aren't real. All the care and the love that they showed you was just programming. Some characters feel really weird about this, while others resolve to say that it doesn't matter whats "REAL" as long as what they feel is real. This is why they bring back Miwako, who ended up dying earlier in the game. The appreciation for digital life is something I've always enjoyed, in stories like Ender's Game (Jane), Star Trek (Data, Doctor), and even Moon (Gerty 3000), the characters show an admirable dimension of loyalty and care for their "real" counterparts that makes them so awesome.

Uncovering the mystery of the world within 13 Sentinels was probably the greatest narrative adventure that I've ever had in my life. There were many times when I had to go to work the next day and needed to go to bed, but instead I just stayed up playing this and went to work tired, except I wasn't tired, I was hyped with curiosity!
The way that the game gives you little clues, and each "episode" with included clues ends on a cliffhanger style bit of information absolutely drove me. I probably haven't been this in love with a game since... Maybe Ghost Trick.
It has everything! Time shenanigans, talking cats, ghosts, evil robots, giant mecha, reincarnated robot androids, tiny little adorable robots, traps (both the physical kind, and the crossdressing kind), kaiju!, strategic planning, teleportation, a story that spans across thousands of years, amnesia... You name it! And pretty much every trope you could possibly think of gets integrated in a very clever and fun way.
If you've got time to manically obsess over a game, do pick this one up. There isn't a ton here in terms of replay value, though the simulation battles do offer an extra campaign of difficulty if you want more. Its extremely challenging and I got stuck on one battle in particular for quite awhile.
I will probably come back and add edits to this review later on.