That Time I Got Reincarnated as a Slime: Isekai Memories

That Time I Got Reincarnated as a Slime: ISEKAI Memories (転生したらスライムだった件：魔王と竜の建国譚) is a 3D battle RPG. This game is developed by BANDAI NAMCO Entertainment Inc., WFS. The game features an opening theme song titled "Phantom Lights" performed by Takuma Terashima and animated Eight Bit. This game is free and available on the Apple App Store & Google Play Store. Check out the FAQ by the developers of the game: here. The game was officially released on October 27, 2021; was available to be played the following day.

Story
The main story follows that of the anime.

Original Story
Aside from that, there are original stories made specifically for the game under the supervision of the original author, Fuse.


 * 1) On the way to Dwargon, Rimuru looks at his reflection in a puddle and finds himself transported to a different place. He is then confronted by a different Gobta & Ranga. Gobta's counterpart, named Vajra, had evolved into a lightning ogre after absorbing black lightning from the dire wolves while Ranga's counterpart had evolved into a Guitar Wolf after absorbing the power of sticky thread & steel thread. Initially confused, Rimuru fights and defeats the two. He considers absorbing them to analyze them, but the two are called back by an unknown entity. Rimuru is then ejected out of the mirror world and he is unable to remember the events.
 * 2) After absorbing Shizu, Rimuru looks in a puddle and finds himself transported back to the time Ifrit escaped Shizu. Rimuru suddenly remembered the last time he was transported and Great Sage deduces that he can only retain his memories of the mirror world while inside of it. Rimuru approaches Shizu, who tells him to stay away, but Ifrit, having taken a new form is escapes Shizu. Realizing that another Shizu still exists inside of Rimru, Ifrit attacks him, revealing that he can now manipulate both fire and ice. Rimuru manages to defeat him, but before he can absorb Ifreet, the demon is called away and retreats. Rimuru then finds himself back in tempest, forgetting the events that just transpired, meanwhile, a hood figure observed Rimuru through a puddle.
 * 3) An alternate version of Shion is shown after the destruction of the ogre village by the orcs. She converses with a hooded figure through a puddle of water who convinces her go give up her heart to increase her power. Meanwhile Rimuru, Shion & Shuna are standing in front of a mirror (Shion & Shuna are trying to make Rumuru wear dresses) when they are pulled into the mirror world. Rimruru wonders how Shion and Shuna came with him that time, but they are confronted by a different Shion, who introduces herself as Dodomeki and antagonizes the group. A woman then appears and introduces herself as the witch Izis. she then goes on to explain the nature of the mirror world, a place based on people's ideas of the strongest versions of themselves. The witch then reveals that her actions have been motivated by an interest in Rimuru and orders Dodomeki to attack him. Shion defends Rimuru, but Dodomeki mock Shion & Shuna for becoming subordinate to a slime while the orcs are still alive. Shuna attack her but, Dodomeki keeps regenerating, revealing that her body contains the souls from all the deceased ogres. and fights the two kijin. Dodomeki is powerful enough that Rimuru decides it would be best for Shion & Shuna to retreat, but Izis erects a barrier of mirrors to stop them. Dodomeki then fires off her Might Soul Glare attack, which reflects off the mirrors and hits Rimuru. Rimuru decides to defeat Izis while Shuna restarts her fight with Dodomeki, but before they can continue, they are interrupted by a pink slime which then proceeds use predator on Dodomeki. Everyone is confused, however, Rimuru's group is suddenly transported back to Tempest and are left unable to remember the events.

Gameplay
The game's main gameplay comes in 5 parts.

Establishing Tempest
Players are able to build their own version of Tempest using the game's Nation-Building System, building villages into towns and towns into cities as you progress the story. Players can interact with other characters in towns as well.

Battles
The game recreates the characters of the series in 3D graphics. characters can pull off various skills and finishing moves from the original series.

Predator Quests
In special Predator quests, players will be able to use their Predation skill to devour enemies unlike in standard quests, allowing players to acquire and improve their characters' skills!

Player Support
Great Sage, who aids the Rimuru in the original story, acts as the main method of player support, helping the player along their quest.

Interact
The game also includes a feature allowing players to interact with other characters in voiced conversations, give them gifts such as food and make friends with them in-game.