The Battle Cats

In total, there are 4 sagas in the main story, which each contain three chapters, except for "The Aku Realms", which only has one chapter. In total, there are ten total chapters, but with the first three sagas, each chapter is essentially a reskin of the previous one. They contain the same levels, theme, and treasures across all three Chapters, with the only difference being the amount, difficulty, and selection of enemies that appear in levels. As well, the opening and ending dialogue to each saga's chapters is reused across all three chapters.

The story begins in the chapter Empire of Cats (commonly shortened to EoC), where an army of "Battle Cats" travel the globe to conquer its nations. Their inferred creator/leader is the fictional deity, The Cat God,[4] who can be unlocked as a power-up early on in the story and as a unit upon further progression in the story. Throughout EoC, the Cat army battles across various countries and cities to take over the world and recruits special units known as Legend units. These units are akin to mythical beings known as "The Heroes of Legend", who were ancient warriors that wielded immense power. After conquering Earth, the Cats finish off resistance to their rule by conquering the Moon and obtaining a time machine.

The second main story saga of the game, Into the Future (shortened to ItF), revolves around the time machine the Cats obtained at the end of Empire of Cats. Upon using the device, they are suddenly transported to the year 29XX and find that Aliens have taken over Earth. The Cats fight across new locations, including the aliens' Floating Continent and Great Abyss, and battle brand-new enemies to reconquer the world. After driving the alien forces off the planet, the Cats arrive on the moon, as they had during EoC. However, this time they face corrupted versions of the Legend units they had recruited during EoC. After defeating these powerful doppelgangers, their Legend units unlock their true forms, granting them more power and new abilities. The saga ends with the Cat army deciding to build a rocket to venture further into space and continue the fight against their alien adversaries.

The third main saga of the game, Cats of the Cosmos (often shortened to CotC), begins with the Cat army invading the cosmos, presumably using the rocket they built at the end of ItF. However, the Aliens they find out in space are unlike those on Earth, as their power is enhanced with stars and they have the ability to warp Cat units away as well as damage-nullifying barriers. The Cats battle these new opponents across the solar system and continue to venture further into the galaxy. Eventually, they arrive at an explosion in space known as "The Big Bang", where they encounter and fight the Cat God himself. After defeating him and his hordes of Starred Aliens, Cat God reveals that he had been the narrator throughout CotC and that despite his appearance as an ancient deity, he is in fact only around 20 years old. After the cats and Alien forces come to a pseudo-ceasefire, Cat God declares that the cats should move onward to the Realm of Legends. However, a strange force known as Filibuster Obstructa arrives from outside the galaxy, and is an entity of chaos and destruction serving as the final test for the Cat Army in their conquest of the Cosmos.

The last main saga of the game, The Aku Realms, takes place at an unknown point after CotC. The saga begins with a Cat leader, Empress Cat, conducting research on a mysterious group called the Aku, who are associated with altars that are weakening the Cat Army's power. With the help of a Cat named Aku Researcher, she manages to open a portal to another realm called the Aku Realms, but is possessed by the Aku's power and becomes the Possessed Empress. Upon entering the Aku Realms, the Cats find more altars that severely weaken them, which a dark priest named Mamon built to prevent anyone from interfering with his plan. He seeks to unleash the god of destruction, known as Jagando, the Lord of Ruin, by undoing the seals of power that the heroes of legend placed over him. The Cats, with their power limited to a fraction of what it once was, fight across a shattered and twisted version of Earth to destroy the altars and regain their strength.

Upon reaching Norway and destroying half of the altars located in the Aku Realms, they find a large mountain called "Mount Aku" in this world's Scandinavia. Upon venturing up the mountain, Mamon attacks them, and they face him with only half their strength. Eventually, the Cats prevail and force Mamon to retreat, but he flees with the crystal of awakening; the last component needed to awaken Jagando. The Cats finish destroying all the altars on Earth and travel to the Moon to destroy the last altar and confront Mamon. With Mamon's defeat, the last altar is seized, and the Cats' power is almost fully restored. However, Mamon succeeds in reawakening Jagando, and with the last of the Cats' power being held by Jagando himself, they arrive back on Mount Aku to face him. After a long battle, the Cats defeat and seal away Jagando once more and take his egg to raise as their own.

With the Cats' triumph, the Aku Altars are universally deactivated, allowing the Cat army to freely venture into lands they had been previously obstructed from. With his plan a failure and his army in shambles, Mamon loses motivation to continue his plans. However, this allows him to refocus his mind on his family, whom he reunites with for the first time in nearly a decade. He thanks the Battle Cats for giving him an opportunity to change his ways, but leaves them with a menacing message: "We'll surely meet again, Battle Cats. Just you wait..."

Legend Stages are stages that supplement the main story of Battle Cats. These stages are split into two main groups: Event Stages and Sub-Chapter sagas. While all Sub-Chapter sagas are canon to the story of Battle Cats, a few Event stages, such as collaboration stages, are not. While all Legend stages take place after the first chapter of EoC, where they fit within the greater story and timeline is unknown.

Stories of Legend (often shortened to SoL), is the first of the Sub-Chapter sagas and takes place sometime between the completion of chapter one of EoC and the beginning of the Aku Realms. SoL begins with the Cats using the time machine they obtained at the end of EoC to travel 20 years into the past, prior to the Cat God's birth/creation. They fight new and old enemies as they aim to collect Cat Food and recruit Legend units to add to their army, who are similar to those recruited in EoC since they resemble the Heroes of Legend. Eventually, the Cats accomplish their goals and travel back to the present, but upon emerging from the time machine they find themselves in an unfamiliar place.

Uncanny Legends (often shortened to UL) is the second of the Sub-Chapter Sagas and takes place after SoL and CotC. After defeating and recruiting Mecha-Bun—the final boss of SoL—the Cats' time machine brings them to an ancient world, one where Relic enemies, a powerful class of enemies with the ability to Curse their opponents, haven't gone extinct yet. The Cats soon realize that some of the Legend units recruited during SoL are merely descendants of the true Heroes of Legend. Like before, the Cat Army defeats and recruits these ancient Legend units into their army. During their journey, the Cats also find "a dark guild researching forbidden knowledge" and "the REAL ultimate superweapon". The former most likely refers to the Aku, but it is unknown what the latter refers to. Near the end of UL, the Cats form a project to "Catify" all of humanity and come across the ancient Sacred Tree, whose guardian is Zero Luza, the ancestor of humanity. Upon defeating the Great Ape Lord, a God emerges from the tree and tells the Cats to find a sage in another world while drawing a can of Cat Food in the sky. The Cats, with a new journey ahead of them, venture into a new world.

Zero Legends (sometimes shortened to ZL) is the third of the Sub-Chapter sagas and features bosses previously only found in Advent Stages. After traveling through a spacetime distortion to the "other world", the Cats find themselves in an alternate universe at its Big Bang and face Metafilibuster, a corrupted and altered version of Filibuster Obstructa. After emerging victorious, the Cats soon find that the laws of this universe are drastically different from their own, with natural phenomena such as snow in volcanoes and forests filled with poisonous gas. As well, enemies that are individuals in their world are commonplace here.

Cat Capsules, often referred to as gacha, is an area where the player can spend Cat Tickets, Rare Cat Tickets, Lucky Tickets, and Cat Food to obtain Cat Units and Ability Capsules. The rewards earned are then either used to add a "plus level" to a Cat, exchanged for NP/XP, saved in the Cat Storage to be used later, or exchanged for a Rare Ticket. While many cats can be obtained outside of gacha, Rare, Super Rare, Uber Super Rare, and Legend Rare Cats are exclusive to it.

The Battle Cats POP! (often abbreviated to BCP) was released for the Nintendo 3DS worldwide on June 27, 2016.[15] The game features mechanics similar to The Battle Cats, but also introduces a 2 player VS mode and made use of the 3DS 3D capabilities.[16]

The Battle Cats POP! received average reviews. CJ Andriessen of Destructoid gave the game a 7 out of 10 and wrote that "The Battle Cats POP! is a game that's as fun as it is weird. When it's not putting you in time out with the energy meter, it can be addictive like Pokémon. Too much of its free-to-play roots are still present, but even with these elements, it's still a worthwhile time killer."[12] Matt S. of Digitally Downloaded gave 3.5 stars out of 5 and noted "what sets Battle Cats apart from the many similar games of similar depth and strategy is that hugely creative edge. This game is the distinctive and memorable example of the genre, because the artists had the sense to do something that makes no sense, but we end up looking forward to each new level just to see the insanity that it brings."[14] However, the stamina system was criticized by reviewers, as Louisa Bhairam with Nintendo Life stated "It's a bit of an odd system for a game which requires no micro-transactions, [...] It's a feature which should have been removed entirely for the 3DS version.[13]

The Battle Cats Unite! was released for the Nintendo Switch by Bandai Namco Entertainment in Japan and Southeast Asia on December 9, 2021.[17] The game is a revamped port of The Battle Cats, with a new 2-player co-op mode and many minigames exclusive to this version.[18]

Battle Cats Rangers, an idle/clicker game published by MEMORY Inc and developed with YD Online Corp, was released for Android and iOS devices on April 27, 2017. In Battle Cats Rangers, players tap the screen as quickly as possible to attack incoming enemies and bosses that swarm their team of Cats. 2 weeks prior to release, a pre-registration campaign was announced which encouraged users to sign up for in-game currency.[19] By using coins and cat food, the in-game currency, players can level up their Cats to deal more damage and progress through the game. Over time, players can add more Cats to their team and encounter stronger enemies they have to defeat.[20] After 2 years, the game shut down its online servers on March 29, 2019 and could no longer be played.

5 years after the release of The Battle Cats, PONOS Corp released Go! Go! Pogo Cat, a simple infinite platformer similar to Flappy Bird. The player directs a Cat riding a pogo stick to gain as much distance as possible, collecting items like gems. Players that have The Battle Cats downloaded can complete certain missions in-game for rewards redeemable in The Battle Cats.[21]

On February 23, 2021,[22] PONOS Corp announced and released The Burgle Cats, a game where the player gathers a crew of Cats to try and steal from other players' manors while evading various obstacles such as traps and guards. The player can also defend and fortify their own manor to ward off other crews and protect their treasure.[23]

On November 13, 2021, PONOS Corp released Battle Cats Quest. In this game, players roll a spherical Cat on land to knock off enemies from various stages and earn coins. Similar to Go! Go! Pogo Cat, players can complete in-game missions for rewards redeemable in The Battle Cats.[24]