Collaborations (A-E)

Dragon Egg
A game collaboration with Dragon Egg (ドラゴンエッグ(ドラエグ)) was held from August 13, 2021 to August 27, 2021. Dragon Egg is a japanese collaborative battle RPG online game where you can explore the world with your dragon as a hunter and your partner, or you can join forces with others to form a team. You can obtain 4 limited monsters during this event through gacha (a Japanese roulette game). This includes the following: Rimuru, Shuna, Veldora and Milim. To obtain Diablo as a character, you would need to earn points, by defeating monsters and earning points, to exchange a ticket for him.

Transportation
[[Media:Unofficial Preview - Rimuru Mimicry Tram.mp4|Watch a 30 seconds long video of the mimicry.]]

That Time I Got Reincarnated as a Slime has collaborated with a few cities to promote Tensura by painting a few of Rimurus on the tram in certain parts of the city. This includes Toyama or Nagasaki. According to the Tensura website, this project is going to expand to various parts of the country.

On September 14, 2021, the official twitter for tensura announced that a collaboration with the Toden-Arakawa line will feature more trams with the logo on the side of the train. The route for the train will go as follows:
 * 1) Toyama Local Railway City Train (Toyama City, Toyama Prefecture)
 * 2) Nagasaki Electric Tramway (Nagasaki City, Nagasaki Prefecture)
 * 3) Fukui Railway Fukui Line (Fukui City, Fukui Prefecture)
 * 4) Tosaden Kotsu (Kochi, Kochi Prefecture ) City)
 * 5) Tokyo Metropolitan Transportation Bureau Tokyo Sakura Tram

Ragnarok X
From September 10, 2021 until October 10, 2021 Ragnarok X, abbreviated as ROX, will feature new events such as new quests, outfits, MVPs, mini-bosses, and more.

Morinaga (Kyorochan)
That Time I Got Reincarnated as a Slime has collaborated with Morinaga to produce a limited edition ChocoBall from September 14, 2021 to November 14, 2021. Kyorochan (キョロちゃん) is a Japanese cartoon bird that serves as a mascot for a chocolate known as ChocoBall. This collaboration aims to reduce stress by eating some delicious chocolates. During this event, you can collect 12 different stamps by great sage. After purchasing some ChocoBall, you can stand a chance to win a limited edition special tensura 500 yen QUO card. The card is only available to 500 lucky individual.

Disclaimer: This event is only available in Japan. Official Collaboration Link: https://www.morinaga.co.jp/kyorochan/tensura/

Morinaga (Background)
Kyorochan is one of the brand owned by Morinaga (森永製菓). It had an anime series that ran from July 1, 1999 to March 29, 2001, with 91 episodes. Morinaga is a confectionery company that was founded by Taichiro Morinaga (森永太一郎) since 1899 in Tokyo, Japan. He wanted to provide delicious and highly nutritious Western confectionery to the people of Japan.

The Alchemist's Code
Rimuru (both slime and human form), Benimaru, and Milim appeared in a collaboration with The Alchemist's Code.

"The Alchemist Code is a free-to-play mobile strategy role-playing game developed by Gumi for iOS and Android devices. It is designed as a turn-based tactical role-playing game, using elements similar to titles such as Final Fantasy Tactics and Tactics Ogre. As part of the game's gacha system, players can summon characters from the game's story or other fan titles, which players can use to build a party of four units. Game play is presented in a 3D isometric view."