One of the best visual novels out there.
G-Senjou no Maou
is probably the definitive series to show people that the entire Visual Novel medium isn't all about h-scenes.
Let's start with what it does right: first of all, the Serial Escalation
aspect. Each arc steadily becomes more and more action-packed as Maou raises the stakes involved for the protagonists while keeping suspension of disbelief intact. What's strange about this series is that it's an action series, but it doesn't rely on awesome fights; instead it relies on the protagonists attempting to outwit the antagonist. It's like Code Geass
or Death Note
, but it doesn't rely on fantastical aspects to achieve the action.
Second, the characters. Haru, in particular, is one of the best heroines in a VN — her interactions with the main character are hilarious, but you never forget that she's also a scarily competent thinker capable of forcing Maou's hand. Almost all the characters, even the antagonist(ic) ones, have an interesting backstory and character development. Take for example, Tsubaki's arc, which deconstructs her messianic tendencies, as well as moving her character development. Each heroine features unique relationships, while the story as a whole mixes character archetypes in a refreshing and entertaining manner.
Third, the music. It's very important to have great music for a VN, since it's pretty much what sets it apart from a novel with pictures. That said, the music is beautiful, even taking to account that they just remixed classical pieces. The most excellent use of music for this VN has to be in the epilogue when the song "Close Your Eyes" plays.
I can find few faults with this novel, but they're still there. The branching of routes, for example, is somewhat detrimental to the flow of the plot and could've been handled more tastefully. Mizuha's route in particular is pretty jarring considering that practically nothing happens.
Overall, I consider G-Senjou no Maou
one of the best examples of its medium, and is the definitive VN to show that visual novels aren't all mindless fap material; they can also churn out excellent and engaging stories.