Doomsday: Last Survivors x Attack on Titan: the January 2026 crossover explained

Doomsday: Last Survivors: the Attack on Titan crossover, explained (January 2026)

Crossover launched January 1, 2026 — first major collab of the year.
Wall of Titan event — runs until February 28, 2026.
Hero fragments for Eren Yeager — recruit the collaboration hero.
Titan skins and beasts — Colossus Shelter, Armored Titan, Cart Squad.
Two-phase battle pass — phase 1 runs January 1-31, 2026.

Introduction

IGG opened 2026 for Doomsday: Last Survivors with a crossover against Attack on Titan, launched on January 1. The collaboration runs until February 28, 2026 and mixes zombie survival strategy with titan invasions. What matters for players is the reward track: a free collaboration hero, titan-themed skins and a battle pass in two phases. Here is what the event contains, verified from IGG’s announcements.

A crossover two months in the making

The game is IGG’s post-apocalyptic survival strategy title for Android, iOS and PC, built on base building, resource management and real-time zombie combat. IGG has run licensed crossovers through 2025 — Pacific Rim, Godzilla vs Kong, Metal Slug 3 — and Attack on Titan is the first major crossover of 2026. The event page lives at dls.igg.com/attackontitan. For players, a licensed crossover means limited-time content: heroes, skins and beasts that will not return once the event closes.

The Wall of Titan: Doomsday Rebellion event

The main event is Wall of Titan: Doomsday Rebellion. It began on January 1, 2026 and ends on February 28, 2026, with several sub-events running throughout. The pitch is simple: zombie hordes meet titan invasions, and commanders fight both. If you want the limited rewards, the whole window matters — February 28 is the hard deadline. In practice, log in early: battle pass phase 1 runs to January 31, 2026, and missing it loses its rewards.

Eren Yeager and the exclusive rewards

The headline reward is Eren Yeager. Players earn Eren Yeager Hero Fragments through the event and recruit him as a legendary Rider hero. Other exclusive rewards include the Colossus Titan Shelter Skin, the Armored Titan Biochemical Beast, the Cart Titan Squad Skin and the Whispers of the Broken Wall Chat Bubble. IGG also offered an exclusive laser-engraved Collector’s Card with characters from both franchises. The difference between a permanent hero and a cosmetic is the priority: fragments first, skins second. The risk is waiting — once the event ends, the hero and skins are gone.

Battle pass, sub-events and the World Boss

The crossover ships with a battle pass split into two phases. Phase 1 covers January 1-31, 2026, and phase 2 follows in February. Sub-events run throughout, and a themed World Boss fight is scheduled for January 13, 2026. For players, the World Boss is a server-wide race against the clock: the earlier you hit it, the better your ranking rewards. The event pays off most for commanders who log in daily during January.

Why this collaboration matters

Crossovers are how the game keeps its veteran base engaged between updates. For Attack on Titan fans, it is a way to play with Eren Yeager in a strategy setting. The collaboration demonstrates the live-ops rhythm: two months of themed content, a recruitable hero and exclusive cosmetics. If you want more crossovers like this, IGG has run one every few months — this is the first of the year, not the last.

Conclusion

The crossover runs from January 1 to February 28, 2026. The core loop: play the main event, earn Eren Yeager Hero Fragments, recruit the hero, and grab the titan skins before the deadline. Start with the battle pass phase 1 in January, hit the World Boss on January 13, and do not leave the fragments for the last week.

FAQ

When did the Doomsday x Attack on Titan collaboration launch?

On January 1, 2026 — the year’s first major crossover for the game.

When does the Wall of Titan: Doomsday Rebellion event end?

The event ends on February 28, 2026; limited rewards are only available during the event window.

Which Attack on Titan hero can I recruit?

Eren Yeager, a legendary Rider hero, recruited from Hero Fragments earned during the event.

What skins and beasts are included?

The Colossus Titan Shelter Skin, the Armored Titan Biochemical Beast, the Cart Titan Squad Skin and the Whispers of the Broken Wall Chat Bubble.

Is there a battle pass and a World Boss?

Yes: a two-phase battle pass (phase 1 from January 1 to 31, 2026) and a themed World Boss fight on January 13, 2026.