Once Human Monolith: Introduction
MonolithsMonoliths in Once Human are towering, post-Starfall structures that serve as endgame dungeons. Inside, players face powerful Great Ones in multi-phase boss battles with unique mechanics. Clearing Monoliths rewards top-tier loot, deepens the story, and unlocks new world progression paths.
In Once Human, Monoliths are towering anomalies left behind by the Starfall event—think ancient alien skyscrapers, but meaner. These ominous structures aren’t just visual landmarks; they’re homes to the Great Ones, otherworldly bosses that don’t believe in fair fights or personal space. Every Once Human Monolith battle is a climactic encounter with one of these cosmic horrors and marks major story progression. If you’re wondering why your peaceful farming session got interrupted by the sky screaming, it’s probably a Once Human Monolith waking up nearby.
Monolith System Explained
The Once Human Monolith Guide exists for a reason: going in blind is a great way to get yourself turned into an artistic smear on a crater wall. Each Once Human Monolith encounter is locked behind a chain of tasks—mainly activating and stabilizing Rift Anchors. These rifts are mini-events in their own right, often filled with aggressive enemies and environmental hazards. Close enough rifts, and you’ll trigger the Monolith’s final phase: an arena-style fight with a Great One that tests your timing, gear, reflexes, and possibly your patience.

Besides bragging rights, beating a Monolith gets you powerful loot, unlocks new abilities, and opens up deeper parts of the world. This isn’t just about slaying a giant bug-god for fun. It’s about progression—both narratively and mechanically. Every player who wants to stay relevant in the late game will need to face a Monolith eventually, and the Once Human Monolith Guide helps make sure you don’t die gloriously and pointlessly.
Once Human Monolith Bosses
| Name | Boss | Location | Recommended Level | Phase | Rewards |
|---|---|---|---|---|---|
| Monolith of Greed | Ravenous Hunter | Dayton Wetlands | Lv.10–50 | 1 | Burn and Unstable Bomber series weapon mods, Festering Gel, etc. |
| Gaia Cliff Monolith | Treant | Broken Delta | Lv.20–50 | 1 | Power Surge and the Bull’s Eye series weapon mods, Harveseed. |
| Mirage Monolith | Arachsiam | Iron River | Lv.30–50 | 1 | Fast Gunner and Fortress Warfare series weapon mods, Dreamcatcher. |
| Monolith of Thirst | Shadow Hound | Chalk Peak | Lv.40–50 | 2 | Shrapnel and Bounce series weapon mods, Canine Skull. |
| Forsaken Monolith | Forsaken Giant | Red Sands | Lv.60 | 4 | Nutcracker. |
| Monolith of Greed – Hard | Ravenous Hunter | Dayton Wetlands | Lv.50 | 3 | Burn and Unstable Bomber series weapon mods, Festering Gel, etc. |
| Gaia Cliff Monolith – Hard | Treant | Broken Delta | Lv.50 | 3 | Power Surge and the Bull’s Eye series weapon mods, Harveseed. |
| Mirage Monolith – Hard | Arachsiam | Iron River | Lv.50 | 3 | Fast Gunner and Fortress Warfare series weapon mods, Dreamcatcher. |
| Monolith of Thirst – Hard | Shadow Hound | Chalk Peak | Lv.50 | 3 | Shrapnel and Bounce series weapon mods, Canine Skull. |
| Monolith of Greed – Pro | Ravenous Hunter | Dayton Wetlands | Lv.50 | 4 | Burn and Unstable Bomber series weapon mods, Festering Gel, etc. |
| Gaia Cliff Monolith – Pro | Treant | Broken Delta | Lv.50 | 4 | Power Surge and the Bull’s Eye series weapon mods, Harveseed. |
| Mirage Monolith – Pro | Arachsiam | Iron River | Lv.50 | 4 | Fast Gunner and Fortress Warfare series weapon mods, Dreamcatcher. |
| Monolith of Thirst – Pro | Shadow Hound | Chalk Peak | Lv.50 | 4 | Shrapnel and Bounce series weapon mods, Canine Skull. |
Once Human Monolith: Types and Difficulties of Monoliths

Not all Once Human Monoliths are created equal. In Once Human, they come in three flavors: Normal, Hard, and Pro. Each step up in difficulty means nastier mechanics, harder-hitting Great Ones, and fewer chances to slack off. Normal Monoliths are the appetizer—still dangerous, but manageable with solid gear and basic teamwork. Hard mode ups the ante with smarter AI, more phases, and punishing arena mechanics. And then there’s Pro, where bosses practically file their taxes between phases and you’d better bring your A-game or get melted into stylish goo.

The Once Human Monolith Guide emphasizes that difficulty isn’t just about numbers. A Pro Once Human Monolith boss might not have the highest health pool, but it will force you to adapt constantly—dodging arena hazards, managing adds, and timing burst damage windows with ruthless precision. Still, with a well-tuned build and good communication, even these top-tier threats can be handled. Builds that focus on debuffing, shielding, or crowd control shine especially bright here.
Consumable Buff Types
Example Items: Canned Meat, Bone-In Deviated Sausage, Stargazy Pie
Example Item: Whimsical Drink
Example Items: Shellfish Meat, Stardust-Infused Recipes
The good news? Every Once Human Monolith tier drops appropriately scaled loot, and beating higher difficulties gives you more than just gear—it earns you server-wide respect. The Once Human Monolith Guide isn’t just for survival; it’s your path to mastery. Know the challenge. Rise to it. And remember: “Pro” doesn’t mean “impossible.” It just means fewer bathroom breaks.
Once Human Monolith: Overview of Specific Monoliths and Their Rewards

Each Monolith in Once Human brings its own flavor of chaos—and reward. From poison-drenched lairs to bosses that chew through your shields like bubblegum, the diversity is part of what makes these battles a highlight. The Once Human Monolith Guide highlights not just how to find them, but why they’re worth the bruises, stress, and occasional group wipe. Whether you’re chasing weapon mods or just want to prove you’re tougher than whatever crawled out of the Starfall, there’s something in it for you.
Monolith Overview
🧟♂️ Boss: Ravenous Hunter
⚙️ Phases (N/H/P): 1 / 3 / 4
🎯 Key Rewards: Burn, Unstable Bomber mods, Festering Gel 💥
🧟♂️ Boss: Treant
⚙️ Phases (N/H/P): 1 / 3 / 4
🎯 Key Rewards: Power Surge, Bull’s Eye mods, Harveseed 🌱
🧟♂️ Boss: Arachsiam
⚙️ Phases (N/H/P): 1 / 3 / 4
🎯 Key Rewards: Fast Gunner, Fortress Warfare mods, Dreamcatcher 🕸️
🧟♂️ Boss: Shadow Hound
⚙️ Phases (N/H/P): 2 / 3 / 4
🎯 Key Rewards: Shrapnel, Bounce mods, Canine Skull 🐾
🧟♂️ Boss: Mensdevoran (Final)
⚙️ Phases (N/H/P): 4
🎯 Key Rewards: Nutcracker 🧠 (bring friends)
The Monolith of Greed kicks things off with the Ravenous Hunter, lurking in the swamps of Dayton Wetlands. It’s a solid early-to-mid-tier encounter and a good chance to earn Burn or Unstable Bomber mods. Then there’s Gaia Cliff, where the Treant makes things personal with a root-smashing, leaf-tossing tantrum. In Iron River, Mirage Monolith houses Arachsiam—a nightmare of webs, illusions, and “what the hell just hit me.” Moving deeper, Chalk Peak’s Monolith of Thirst unleashes the Shadow Hound, a blur of teeth, shadow clones, and bounce shots. And finally, Red Sands holds the Forsaken Monolith, home of Mensdevoran—aka “maybe bring backup.”
Once Human Monolith: Optimizing Your Build for Monoliths

To survive Once Human Monoliths, you don’t just need guts—you need gear. In the Once Human Monolith Guide, optimizing your build isn’t about chasing every shiny piece of loot. It’s about deliberate choices that synergize. The core of a strong Monolith build—especially if you’re rocking a Last Valor SOCR setup—is crit. Stack crit rate and crit damage, and let the rest fall into place. Mods that trigger reloads off weakspot hits or double-dip on shrapnel damage are pure gold. Every crit not only hurts more—it multiplies your output, especially when paired with Shrapnel synergy.

Gear matters, and yes, it’s worth fine-tuning down to the helmet. Berets boost shrapnel volume. Gastight offers focused burst damage and DoT. Cage Helmet? Full-on shrapnel storm. The right call depends on your weapon, but the Once Human Monolith Guide leans toward Beret for SOCR, Gastight for G17, and Cage for LMG madness. Your gloves should scream crit, and your chest piece can start with crit rate then pivot to defense when stats allow. Mods like “Momentum Up” and “Covered Advance” are best-in-slot, no debate. Violent-calibrated gear ensures crit damage stays high, and substats like reload speed, weapon damage, and boss-specific bonuses round things out.
Build Element Breakdown
💡 Notes: Core for Last Valor SOCR builds
💡 Notes: Crit bonuses + reload synergy
💡 Notes: Depends on weapon and playstyle
💡 Notes: Top-tier for sustained damage and survivability
💡 Notes: Prevents stuttering and low frame issues during intense encounters
Lastly, your real-world gear matters too. The Once Human Monolith Guide won’t ignore performance. If you’re playing on 8GB RAM, stutters will haunt you like a badly-coded ghost. Aim for 12GB minimum, 16GB if you want a smooth ride. SSDs cut down loading lag. A 4GB GPU should keep your frame rate tolerable; anything lower and you might as well be playing in a slideshow. Optimize your setup inside and out—because nothing’s worse than dying to lag in a boss fight you were about to win.
Once Human Monolith: General Tips for Monolith Encounters

Once Human Monoliths aren’t just big angry bosses—they’re tests of everything you’ve built. As a Meta-Human in Once Human, you’re not some squishy survivor; you’re a Stardust-wielding powerhouse with a genetically enhanced edge. But don’t mistake power for invulnerability. The best fighters in any Once Human Monolith Guide are the ones who prepare, adapt, and know when to sprint and when to bunker down. Keep moving, learn boss attack patterns, and make the most of your shrapnel generation if you’re specced for it.

Your backpack crow “V” isn’t just for atmosphere. That feathered parasite is part coach, part lore-dump, and occasionally sarcastic alarm system. Listen to it. Likewise, Mitsuko and the Deviations she introduces offer strategic depth. Some Deviants you can tame and bring along—ideal for extra DPS or utility mid-fight. Pair the right one with your build and you’ll thank the Once Human Monolith Guide later. If you’re flying solo, don’t ignore the matchmaking system, but bring patience—it’s sometimes slower than a rusty crossbow.
Monolith Survival Tips
🧠 Extra Insight: You’re not a tank—you’re a mutant scalpel
🧠 Extra Insight: Offers combat hints and warnings mid-fight
🧠 Extra Insight: DPS pets or resource farmers—know what you need
🧠 Extra Insight: Party finder is useful, but may take time
🧠 Extra Insight: Not all good-sounding effects help in Monoliths
If you’re new, the mod system will feel like someone dumped a bag of techno-runes in your lap. Take it slow. Focus on understanding what each effect actually does in a Once Human Monolith encounter. Mods that sound great on paper might be trash in real-time if they don’t fit your weapon or playstyle. And while guides and videos help, nothing beats actual experience—especially when you’re sprinting through a collapsing arena with three HP and a dream.
Once Human Monolith: Game Lore Context

The world of Once Human isn’t just wrecked—it’s been torn inside out by science gone rogue. The Starfall didn’t come from the stars; it came from inside labs owned by Rosetta, a corporation that treated the laws of physics like vague suggestions. Their meddling with Stardust and Rift Space energy cracked reality open, and from that crack poured nightmares, mutations, and the Monoliths themselves. These giant anomalies didn’t just appear—they were built, intentionally or otherwise, to anchor the chaos Rosetta unleashed. That’s the lore heartbeat behind every Once Human Monolith Guide.

Each faction in Once Human tells a different story of survival and ideology. The Mayflies—your people—are scrappy rebels with moral grit, made up of Rosetta defectors, civilians, and enhanced Meta-Humans like you. Then there are the Vultures, chaos cultists and mutant fanboys who worship Old Ones and want to see the world burn again, preferably bigger. The Union is your standard “keep civilization alive” crowd, while the Column plays 5D chess in the background with a shadowy agenda. Rosetta, of course, remains the Big Bad—an arrogant god-machine still churning out clones and biological horror in their labs.

Characters like Mary aren’t just twists in the story—they remind us the line between human and construct is getting thinner. She helps you early, earns your trust, then flips the table as a Rosetta clone. It’s not just a betrayal—it’s a warning: in Once Human, nothing is what it seems. The Once Human Monoliths reflect this duality. They’re not just boss arenas—they’re living remnants of failed ambition. As the story evolves in expansions like The Way of Winter, new faces like Igna and Chaosweaver deepen the mythos and hint that the worst (or most fascinating) is yet to come.
Faction Overview
🧠 Key Traits: Civilian + Meta alliance, moral backbone
🧠 Key Traits: Violent, savage, mutation-embracing fanatics
🧠 Key Traits: Just trying to keep lights on and rules intact
🧠 Key Traits: Plays neutral until it doesn’t
🧠 Key Traits: Created Starfall, clones, and Monolith horrors
Once Human
Play Once Human on PC and mobile for free and join your friends in a post-apocalyptic world. Fight monsters, uncover secrets, and build your own territory in this multiplayer game. Engage in co-op battles, scavenge for resources, and unlock powerful abilities as you reclaim Earth from horrifying creatures.
Frequently Asked Questions (FAQ)
❓What is a Monolith in Once Human?
🟢Monoliths are large-scale PvE events where players battle waves of powerful Deviants to earn rare loot, acid, and high-tier gear.
❓How do I activate a Monolith event?
🟢You can activate Monoliths by locating a Monolith structure on the map and using a Monolith Key, usually earned from high-level activities.
❓What rewards do Monoliths provide?
🟢Monoliths reward acid, rare materials, weapon mods, and sometimes Great One fragments. Rewards scale with difficulty and participation.
❓Can I solo a Monolith event?
🟢You can try, but it’s not recommended. Monoliths are designed for group play. Enemies hit hard and swarm in waves, so bring backup.
❓What’s the best strategy for surviving Monolith events?
🟢Build a balanced team, focus on AoE damage and healing, and manage aggro smartly. Keep moving and clear ranged threats first.
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