New Title 'Raid of Titan': Cooperative Survival Defense in a Ruined World. Beta Test Begins.

UNCHAIN Inc. (Headquarters: Shibuya-ku, Tokyo, CEO: Wynn Lei) will exhibit its latest title, the cooperative defense game 'Raid of Titan', at the indie game event 'BitSummit PUNCH 2026', held at Miyako Messe in Kyoto from Friday, May 22 to Sunday, May 24, 2026.

'Raid of Titan' is a cooperative survival defense game set on floating islands in the sky after the destruction of the surface world. Players explore during the day, set up armaments in the evening, and prepare for giant attacks at night.

This title features a new integration method with 'THIRD', a stream-intervention platform developed by UNCHAIN. A major characteristic is that stream viewers can intervene in the battle situation from their smartphones or browsers.

In conventional game streaming, viewers participated through comments.

However, 'Raid of Titan' takes this a step further, aiming for a design where the actions taken while viewing directly reflect on the battlefield.

◾️ About Raid of Titan

There were once eight kingdoms on the surface. But triggered by war, humans were used as mediums to create giants, turning them into weapons. At the end of a war that violated taboos, a great catastrophe occurred...

Only one nation escaped to the sky through a 'Gate', but eventually split into three due to internal conflict.

'Raid of Titan' is a cooperative survival defense game set in this world floating in the sky at the end of ruin.

Choose your country and fight for supremacy - Players are former slaves who received the goddess's favor. Accompanied by their partner character 'MIO', they repair ruins and expand territory during the day, gathering blueprints from giant corpses and soldiers' graves. In the evening, they place and strengthen armaments, and at night, they intercept colossal giants as the three nations vie for dominance. Expand your country, chip away at others - your battles rewrite the map.

The biggest feature is the entirely new viewer experience system built upon the viewer intervention system 'THIRD' cultivated by UNCHAIN.

Viewers descend onto the battlefield as 'Divers', utilizing cards to support players and hinder enemy nations. The more viewers there are, the more interventions overlap, and combat power swells - 'The number of viewers directly becomes combat power'. Broadcasters and viewers unite to run through a single battlefield; an entirely new gaming experience only possible in the streaming era is here.

▼ Basic Cycle

Day: Glide down from the sky island to the battlefield. Repair ruins with your partner to expand territory, and excavate 'blueprints' from giant corpses and soldiers' graves.

Evening: Place and strengthen armaments such as cannons and ballistas.

Night: Challenge defense battles against colossal giants, cooperating with your partner and online allies of your nation.

Battle Report: Submit your battle results to the balloon 'Report Office' floating in the sky. Accumulate power for your nation and surpass others.

▼ Game Overview

Steam Store Page
　　◦　https://store.steampowered.com/app/4483720

Official Website
　　◦　Scheduled to open on 5/22

Beta Launch
　　◦　Scheduled to start from 5/22

◾️ Planned Implementation List

Multiplayer
　　◦　Up to 4-player co-op

Full integration with stream-intervention platform 'THIRD'
　　◦　Diver participation, elixir time charging, ally support / enemy interference
　　◦　Viewpoint switching
　　◦　Diver App (Smartphone/Browser): Deck building, treasure chests, shop

Addition of giant weapons and territory expansion through ruin repair

Three selectable nations to join

Asynchronous PvP 'Expedition'
　　◦　Attacking enemy players / Own country is also constantly targeted

Diver-exclusive shop
　　◦　Treasure chests / Card packs

Friend system (interacting with allies in own country)

Transfer system

Multiple character selection / Expanded encyclopedia content

Multi-language support

Large-scale cooperative battles (Raid content)

◾️ About 'THIRD' in this Title

Viewers can play cards from the 'Diver App' on their smartphone or browser, summoning characters to support their country to the battlefield, or interfering with enemy battle situations.

Because each Diver owns their own cards, the number of viewers directly reflects as combat power on the battlefield. In the future, 'changing nationality' will also be possible, and capable Divers will become the stars of various streams.

Based on the empirical data of THIRD so far, 'Raid of Titan' is a flagship title that elevates viewer participation to the first principle of the game, creating a new game genre.

◾️ The Streaming Experience 'THIRD' Aims For

Led by Twitch and YouTube Live, the act of 'watching games' has already become a daily routine for tens of millions of people. But are viewers truly satisfied with just 'watching'? Are comments and Super Chats the entirety of a viewer's desire to intervene?

The stream-intervention platform operated by our company