- Anime Adventures Alien King content is tied to the limited Alien Portal from the Boros update.
- Unlock requirement: You must complete Story Mode before Infinite Mode becomes available.
- How it drops: The Alien Portal is a random drop from waves in Infinite Mode, not from a boss.
- Reward focus: The portal is the primary route to the new Mythic secret unit, Boros.
- Grind smart: Multiple portals can drop in a single Infinite run, so keep farming waves.
What Is the Anime Adventures Alien King Update?
The Anime Adventures Alien King update introduced a wave of One Punch Man–inspired content, headlined by the Alien Portal and the limited secret unit Boros, the alien invader himself. The portal appears as an alien spaceship in your world and serves as the gateway to the update's Mythic-tier rewards.
The single most important detail players miss: the Alien Portal does not drop from any boss fight. It is a random drop while clearing waves in Infinite Mode, which means your first job is unlocking that mode by finishing Story Mode.
Video Highlights:
- Alien Portal drops randomly during Infinite Mode, not from bosses
- Story Mode must be completed to unlock Infinite Mode access
- Multiple portals can drop within a single Infinite run
- The portal is expected to be the path to the limited secret Boros
You cannot enter or farm Infinite Mode until your account has completed Story Mode progression. Speed-running the story with strong AoE units is the fastest path to eligibility.
Unlock Requirements and Drop Mechanics
Before you can chase the Alien Portal, you need to clear the progression gate. Here is a breakdown of the requirements and how the drop system behaves.
| Requirement | Details | Notes |
|---|---|---|
| Story Mode completion | Clear all story stages | Mandatory gate for Infinite Mode |
| Infinite Mode access | Unlocked after story | Where the portal drops |
| Drop source | Random wave clears in Infinite | Not tied to any boss |
| Drop frequency | Multiple portals per run possible | RNG-based, keep grinding |
| Portal reward | Chance at limited Mythic Boros | Low secret chance, patience required |
Key mechanics to understand:
- Random drops: The portal appears randomly while killing enemies in Infinite Mode. There is no confirmed trigger, wave, or boss that guarantees it.
- Run value: Players have reported receiving more than one portal from a single Infinite run, so a long session can pay off multiple times.
- Limited window: Because Boros is a limited secret, treat the update window as your farming deadline.
Since drops are random per wave, prioritize builds that clear waves quickly rather than single-target boss killers. Faster waves mean more drop rolls per hour.
Step-by-Step: Getting the Alien Portal
Follow this sequence to go from Story Mode to your first Alien Portal drop.
Speed-Run Story Mode
Use your strongest AoE and unique-trait units to burn through story stages quickly. Story difficulty is moderate if you already have updated units from the Boros patch.
Unlock Infinite Mode
Once the story is complete, Infinite Mode opens up. This is the only place the Alien Portal can drop, so verify access before committing to a session.
Build a Wave-Clear Loadout
Bring units that handle dense waves efficiently. Spawn-camping strategies at the enemy spawn point help accelerate clears dramatically.
Farm Infinite Waves
Clear waves continuously. Portals drop randomly from kills, so sustained farming is the only reliable method. Multiple drops per run are possible.
Enter the Alien Portal
When the alien spaceship portal appears, enter it for your chance at the limited Mythic reward, Boros.
Once Infinite Mode is unlocked, your account stays eligible for future limited portals too. Story completion is a one-time investment with lasting value.
Recommended Units for the Grind
The Boros update refreshed the unit pool with One Punch Man–themed options. These picks cover the Story speed-run and the Infinite wave farm.
Evolved Genos
- Strong upgrade path
- Excellent for story clears
- Pairs well with unique traits
Metal Knight
- Placement-limited power
- Only two placements allowed
- Great for concentrated chokepoints
Saitama-Type Units
- High-impact magic damage
- Expected to gain more acquisition routes
- Ideal boss insurance during portals
| Unit Role | Best Use Case | Farming Rating |
|---|---|---|
| AoE wave-clearer | Infinite Mode wave farming | ★★★★★ |
| Single-target DPS | Portal boss phases | ★★★★ |
| Support / buff unit | Boosting team clears | ★★★ |
| Placement-limited carry | Chokepoint defense | ★★★★ |
Unique traits significantly boost story-clear speed. If you own trait-reroll resources, apply them to your main carry before starting the grind.
Farming Checklist and Goals
Track your progress toward the Anime Adventures Alien King rewards with this checklist.
Alien Portal Farming Goals:
- Complete all Story Mode stages
- Unlock Infinite Mode access
- Assemble a wave-clear loadout with unique traits
- Earn your first Alien Portal drop
- Secure the limited Mythic Boros unit
FAQ
Q: How do I get the Anime Adventures Alien King portal?
The Alien Portal drops randomly while clearing waves in Infinite Mode. It does not come from any boss. You must first complete Story Mode to unlock Infinite Mode.
Q: Can I get more than one Alien Portal per run?
Yes. Players have reported receiving multiple portal drops from a single Infinite Mode run, since each drop is an independent random roll from wave clears.
Q: Why can't I enter Infinite Mode yet?
Infinite Mode is locked until your account finishes Story Mode progression. Speed-run the story with strong AoE units to unlock it as quickly as possible.
Q: Is Boros guaranteed from the Alien Portal?
No. The portal offers a chance at the limited Mythic secret Boros, and the odds appear low. Consistent farming during the update window is the best approach.