Undertale's merchandise and live-event footprint continues to grow in 2026, with a new knitted-figure line, a sold-out wind symphony concert that added a third date, and a vinyl release of arrangement albums.
Bandai Spirits expanded Undertale's collectible lineup in mid-2026 with the Amicotto knitted-figure series, which mimics hand-knitted amigurumi. The line includes seven characters-Flowey, Human, Toriel, Undyne, Alphys, Napstablook, and Mettaton-rolling out from July to October. The Japan Amigurumi Association supervised the design to replicate yarn textures. Separately, Bandai re-released two gashapon sets from May 2025: the Pinch and Connect Mascot and the Tsumande Tsunagete Mascot, each featuring Sans, Papyrus, Napstablook, Temmie, and Annoying Dog in ball-chain and crab-ring versions.
The first official Undertale wind symphony concert in Japan, held at Kyoto Concert Hall on September 23, sold out immediately, prompting an extra performance on September 22. The Osaka Shion Wind Orchestra, conducted by Yu Nishimura, performs the program. Square Enix also announced two vinyl records of arrangement albums for September 9: a piano album directed by Yoko Shimomura with 15 tracks including 'MEGALOVANIA', and a chill album with remixes by MURO, tofubeats, VaVa, and others. This is the fourth Undertale collaboration from Square Enix.
On the digital side, Undertale was offered at 75% off (245 yen) during the Steam Summer Sale 2026, which ran until July 10. The discount came shortly after the June 25 addition of Chapter 5 to sister work Deltarune, whose Chapter 6 targets a 2027 release. Creator Toby Fox has stated he does not intend to discount Deltarune frequently, making its 20% discount notable.
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Fangamer is reissuing four classic UNDERTALE T-shirt designs as 10th anniversary editions. The shirts, originally released in 2016 and 2017, feature Papyrus, Undyne, Alphys and Catty, and the Amalgamates. Pre-orders are open for two weeks only, with shipping expected in the fourth quarter or later. The re-release coincides with the recent launch of DELTARUNE Chapter 5 and a Steam sale.
Bandai Spirits is releasing a new line of Undertale figures called Amicotto, designed to resemble hand-knitted amigurumi. The series includes seven characters: Flowey, Human, Toriel, Undyne, Alphys, Napstablook, and Mettaton. The figures roll out sequentially from July to October 2026. The Japan Amigurumi Association supervised the design to replicate yarn textures and hand-knitting distortions.
The Undertale Wind Symphony in Kyoto has added a third performance on September 22 after the original two shows sold out immediately. The extra concert will be held at Kyoto Concert Hall, with the same program as the September 23 evening show. The Osaka Shion Wind Orchestra, conducted by Yu Nishimura, performs. A ticket lottery opens July 11.
UNDERTALE is 75% off at 245 yen and DELTARUNE is 20% off at 3,184 yen in the Steam Summer Sale 2026, which runs until July 10. The DELTARUNE discount is notable because creator Toby Fox has said he does not intend to discount the game frequently. The sale follows the June 25 addition of Chapter 5, with Chapter 6 targeting a 2027 release.
Banpresto, a brand of Bandai Spirits, is releasing a new crane game prize figure of Flowey from Undertale as part of its Amikotto series. The figure, supervised by the Japan Amigurumi Association, reproduces the texture of yarn and the unique distortions of hand-knitting to resemble a real amigurumi. It stands about 12 cm tall and will roll out sequentially from July 7, 2026. The series will continue with additional Undertale characters: Human and Toriel are scheduled for August 2026, Undyne and Alphys for September 2026, and Napstablook and Mettaton for October 2026. Undertale is an RPG created by Toby Fox that has received high acclaim internationally, and its sister work Deltarune is currently in development.
Square Enix announced two vinyl records as the fourth Undertale collaboration, releasing September 9. The piano arrangement album features Yoko Shimomura as director and includes 15 tracks like 'MEGALOVANIA'. The chill arrangement album includes remixes by MURO, tofubeats, VaVa, and others. Pre-orders are open now.
SHARE BASE Co., Ltd. announced on June 8 that the first official wind symphony concert for Undertale in Japan, titled Undertale Wind Symphony in Kyoto, will take place on September 23 at Kyoto Concert Hall. Two performances are planned, at 15:00 and 19:00. The concert will be performed by Osaka Shion Wind Orchestra, conducted by Yu Nishimura. Ticket pre-sales begin June 10.
Bandai is re-releasing the Undertale Pinch and Connect Mascot gashapon set in the first week of June 2026. The capsule toy line includes Sans, Papyrus, Napstablook, Temmie, and Annoying Dog, each available in ball chain and crab ring versions for a total of 10 types. The reissue is identical to the May 2025 release.
Bandai is re-releasing the Undertale Tsumande Tsunagete Mascot gashapon figures starting in the first week of June 2026. The set includes five characters-Sans, Papyrus, Napstablook, Temmie, and Annoying Dog-each available in two versions (ball chain and crab ring), for a total of ten figures. Creator Toby Fox supervised the designs.