Once Human Arachsiam boss location, rewards, tips, and more

Arachsiam is one of the more dangerous bosses in Once Human if players aren’t aware of what this powerful spider boss can do. Capable of spinning webs that trap players, as well as featuring devastating melee attacks, the humongous spider can also spawn more adds that players have no choice but to deal with.

Like the Shadow Hound found later in Once Human, Arachsiam also has invulnerability phases as well as other mechanics that the player must be prepared to evade or deal with. If you want to know where it is, and how to fight it, this article has you covered.

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Tips to defeat Arachsiam in Once Human

Always keep an eye out for incoming cobwebs (Image via Starry Studio)

Found in the Mirage Monolith, Arachsiam is a level 30 spider boss in Once Human. It can be frustrating to take it down on your own, but with knowledge of its combat mechanics, it’s more than possible to take it on solo. When dealing with this boss, always try to aim at the glowing points on its chest and thorax. These are its weak points, but you may not always have a clear shot.

Another general tip I recommend is having some kind of DOT (damage over time) because it will make it easier to find the boss when it fills the arena with mist. Its Ranged Attack is spitting cobwebs and venom that players must dodge. It also has a powerful Melee Attack using its forelimbs. Alongside that are a series of important mechanics and skills it has access to:

• Spit Cobwebs: The gobs of cobwebs spat at players leave a trap on the ground. Stepping in it binds and traps them.
• Poison Mist Dispersion: The boss will move and spray a poison mist. Get behind cover to be safe.
• Nurturing Larvae: Summons spider eggs, which spawn exploding spiders.
• Mist: The boss runs up the stone pillar and covers the arena in fog. It also becomes invincible. Kill the eggs on the screen to end the invincible state.

See those little glowy dots on the walls? Shoot them! (Image via Starry Studio)

It’s extremely important to avoid Arachsiam's cobwebs in Once Human. It wraps you up in webbing, making it harder to move and fight. If you’re grouped, allies can shoot you free. Anytime you see spider eggs, they’re worth taking out—especially if Arachsiam uses the Mist attack.

Thankfully, when you’re close to the eggs, they glow purple, so they aren’t too hard to spot. You might have to check the web bridges and walls though, because they won't necessarily be on the ground.

While having range is important in this fight, sniper rifles aren’t so useful. Instead, go with something that has both range and a rapid attack. That way you can quickly deal repeated damage to spiders, eggs, and Arachsiam itself in Once Human. Submachine guns are a good choice.

This boss fight is all about being aware of what’s on the ground, and where the boss is; essentially, a test of situational awareness. Keeping out of range of its powerful melee strikes, and staying on the move to keep pelting it with bullets is going to be key to success here.

Defeating this boss may give you a chance to capture the Dreamcatcher deviant, alongside and collect other items the boss drops. Using a Controller gives you more, compared to if you slay it—which gives you the minimum level of rewards. Prizes for winning this fight include Gear Mods, Weapon Mod Parts, Stardust Source, Electronic Parts, and more.

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Check out our other Once Human guides

• 5 Beginner tips for Once Human
• All Gold Mods and where to find them
• How to get a Gatling Cannon