At 600 mileage points, they unlock the ability to pick one of the four collaboration heroes outright
On June 25th, Netmarble wove two fictional worlds together — the morally charged realm of the Seven Deadly Sins and the class-divided society of Gachiakuta — inviting players to recruit characters who, within their own story, fight against systems that discard the powerless. It is a familiar gesture in the life of live-service games: the crossover as a bridge between communities, offering new reasons to return, new heroes to pursue, and new rituals of daily engagement. The update arrives layered with events and reward structures that speak to the quiet contract between game and player — show up, and something will be given.
- Four new SSR heroes from the anime Gachiakuta have entered the game, each representing characters who, in their own narrative, resist a society built on exclusion — now available to players willing to invest in the summon system.
- The mileage structure creates a slow-burn tension: players must summon repeatedly to accumulate points, with the guaranteed hero selection only unlocking at the 600-point threshold, rewarding persistence over luck.
- Multiple simultaneous events — login rewards, special missions, a bingo challenge, and a boss battle against Vand — fragment the collaboration's rewards across different playstyles, ensuring no single path dominates.
- The conclusion of the long-running 777 Relay Event adds a final layer, with a coupon code delivering Legend Seals, Sweep Tickets, and a Gowther costume — a closing gift that also functions as a welcome mat for returning players.
Netmarble's mobile RPG The Seven Deadly Sins: Grand Cross received a collaboration update on June 25th, drawing in the world of Gachiakuta — an anime rooted in the story of Rudo, a young man cast into a society's underclass and forced to fight the inequalities built into its structure. The crossover translates that narrative into four new SSR-tier heroes: Cleaner Rudo, Cleaner Engine, Cleaner Zanka, and Cleaner Riyou, each carrying the Team Akuta designation.
Access to these characters runs through a mileage system that rewards sustained summoning. Players earn batches of Summon tickets at the 100, 200, 400, and 500-point marks, and at 600 points they may select one collaboration hero outright — a guaranteed outcome for those who commit to the grind.
The update surrounds this core with a web of concurrent events. Daily logins yield up to 77 Diamonds and grant a collaboration hero for consistent attendance. A mission track hands out relic materials and growth resources. A bingo event converts daily play into relic enhancement chests and exclusive reward boxes. A boss battle against Vand opens yet another farming route, letting players exchange defeated-boss currency for the materials needed to power up the new characters — accommodating both mission-focused and combat-focused players.
The update also closed out the 777 Relay Event. Entering the coupon code '777ENDAND' delivers 77 Legend Seals, 77 Sweep Tickets, and a costume for Gowther, one of the game's original cast. Returning and new players qualify for additional bonuses from earlier relay phases, softening the re-entry point and keeping the game's door open to those who had stepped away.
Netmarble pushed a fresh update to its mobile RPG 'The Seven Deadly Sins: Grand Cross' on June 25th, bringing the world of 'Gachiakuta' into the game. The collaboration draws from the anime adaptation of a manga that tells the story of Rudo, a young man falsely accused and cast down into the 'lower world'—a society split between the privileged above and the discarded below. In the narrative, Rudo joins a crew of cleaners fighting against the system's built-in inequalities, and now players can recruit versions of these characters into their own teams.
Four new SSR-tier heroes form the heart of the crossover: '[Team Akuta] Cleaner Rudo,' '[Team Akuta] Cleaner Engine,' '[Team Akuta] Cleaner Zanka,' and '[Team Akuta] Cleaner Riyou.' The game structures access to these characters through a mileage system. Players accumulate points as they summon, earning ten Summon tickets at the 100, 200, 400, and 500-point thresholds. At 600 mileage points, they unlock the ability to pick one of the four collaboration heroes outright—a guaranteed path to at least one new character for committed players.
Netmarble layered the update with multiple simultaneous events designed to keep players engaged throughout the collaboration window. A login event distributes up to 77 Diamonds and grants one collaboration hero simply for showing up each day. A special mission track rewards players with collaboration relic material chests and growth resources upon completion, feeding directly into the gear progression systems that drive long-term play. A bingo event lets players spend earned resources to unlock relic enhancement chests and collaboration-exclusive reward boxes, turning daily gameplay into tangible progress toward powering up the new characters.
A boss encounter against a character named Vand also went live, offering completion rewards and the chance to exchange defeated-boss resources for collaboration relic materials and growth items. This gives players another avenue to farm the specific materials needed to level and equip the new heroes, spreading the reward pathways across different playstyles—some players prefer grinding missions, others prefer boss battles.
The update also marked the conclusion of the 777 Relay Event, a long-running promotional campaign. Players who enter the coupon code '777ENDAND' receive 77 Legend Seals and 77 Sweep Tickets—currency and convenience items that accelerate progression. The event also offers a costume for Gowther, one of the original 'Seven Deadly Sins' cast members, giving veteran players a cosmetic reward tied to the base game's roster. New players and those returning after time away qualify for additional bonuses from earlier phases of the relay campaign, lowering the barrier to entry and rewarding people who cycle back into the game.
The Hearth Conversation Another angle on the story
Why does a mobile game need to collaborate with an anime series? What's the actual draw for players?
It's about expanding the roster with characters people already care about. If you watch Gachiakuta, you recognize Rudo and the cleaners—they're not random new faces. That familiarity makes you want to pull for them, and it gives the game a cultural moment beyond its own universe.
So it's purely about novelty, then? New characters, new events, and players move on?
Not quite. The structure matters. By gating the guaranteed hero at 600 mileage points, Netmarble ensures players have to engage with the summon system seriously. That's where the monetization lives. But the multiple event types—login, missions, bingo, boss battles—they're designed so free players can still make real progress without spending.
What does the 777 Relay Event ending actually signal? Is that just a marketing number?
It's the bookend to a campaign that's been running for a while. The number 777 is intentional—it's lucky in some cultures, and it creates a sense of completion. By revealing the final reward now, they're saying this phase is closing, which creates urgency. New players see it as a limited window; returning players see it as their last chance to grab the Gowther costume.
Do these events actually change how people play the game day-to-day?
Absolutely. A login event means you log in every single day, even if you're not actively playing. The bingo event turns your normal farming into a secondary progression track. The boss battle gives you a reason to coordinate with guild members or use specific team compositions. Each event is a different hook, and together they create a web that keeps you coming back.
What happens after the collaboration ends?
The characters stay in the game, but the events disappear. The summon rates probably drop or the banner rotates out. Players who didn't get the heroes they wanted are locked out unless Netmarble reruns the collaboration later. That scarcity is part of the design—it makes the window feel real.