The Bacteria Saga

The Bacteria Saga (バクテリアの謎 Bakuteria no Nazo, lit. Mystery of the Bacteria) is a series consisted of episodic adventure games developed and published by Smile Games.

Premise
The game takes place in a post-apocalyptic Earth, where humanity has been extinct due to an event known as "The Great Bacteria War", a battle that took 20 years where bacteria grew intelligence due to a mutation and changed their appearances to be bigger and human-like or amorphous-like. Eventually, the war had taken a severe amount of casualties, with most of mankind being killed from the Bacteria. When the war the Bacteria had stopped their ways due to the deaths that occurred. This was too late as all of humanity was extinct, thus making the Bacteria horrified. All of Bacteria kind then changed their ways and decided to live peacefully, while some didn't change at all.

The main protagonist is a 14-year old boy named Kyle. He happens to be the last human on Earth as he survived The Great Bacteria War by going into a bunker and placed into cryogenic sleep by his father before the latter died in the war. The other protagonist is Gumu, a friendly Bacteria who awakes Kyle from his cryogenic chamber and serves as a father figure to him.

Main

 * Kyle (カイル Kairu): The main playable protagonist of the series. He is a 14-year old boy who survived The Great Bacteria War by being placed in a cryogenic chamber by his father in a bunker. When Kyle was brought out of his cryogenic chamber, he was determined to see if his family also survived the war as well. Kyle has red hair, sports a brown t-shirt and blue pants.
 * Gumu (グム Gumu): The secondary protagonist. He is a Bacteria who served in the war, but has changed along with the rest of his kind. Gumu was the one who awoke Kyle from his cryogenic chamber and raised him like a son. He is one of the amorphous Bacteria, as he is shorter than Kyle but not smaller than a rock. Gumu wears a top hat which he uses to store things.
 * Wade (ウェイド Ueido): A raccoon who is one of the few surviving animal species. He was seen a pest for Kyle when Wade first appeared, but later on, Kyle has grown more soft to Wade and now adopts Wade as a pet.
 * Nera (ネラ Nera): Nera is a character introduced in the second game, Episode 2: Post. She is one of the five living members of female Bacteria, as most of them died in the war. She was found by the protagonists in a chamber. She joins them to go to the city of Postberg, the main destination where Kyle and Gumu want to go. She is able to fly whenever she wants to or when something is out of reach for the other characters
 * Carl (カール Kāru): Carl, or his real name CRL-009 is a character that debuted in the third game, Episode 3: Bleak. He is a robot that was found by Kyle was looking for supplies in the bunker. When he was started up, he didn't have his memory card, which starts the plot of Post.