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Once Human Beginner's Guide: Scenarios, Deviations, and Your First Great One

A complete Once Human beginner's guide covering which scenario to start in, the first Deviations worth chasing, base automation, and how to take down your first Great One world boss.

By HostedGG Team
Once Human Beginner's Guide: Scenarios, Deviations, and Your First Great One
Table of Contents

The Short Answer

Once Human mixes survival crafting with third-person shooting in a Lovecraftian-tinged open world, and the system that confuses new players most is its seasonal scenario reset: every season the world wipes into a new map state, so what you build is never truly permanent. Start in Manibus, the introductory PvE scenario, learn the survival and base-building loop there, grab a couple of cheap Deviations early to make combat and gathering easier, and aim your first real challenge at the Treant, one of the more approachable Great One world bosses. Everything else, PvP scenarios, harder Great Ones, endgame Deviations, can wait until that loop feels comfortable.

Pick the Right Scenario First

Once Human runs multiple scenarios at once, each a different ruleset layered on the same core game, and picking the wrong one as a new player makes everything harder than it needs to be.

  • Manibus is the intro PvE scenario, built around server-wide cooperative quests like Prime Wars and Great One takedowns. This is where you should start, full stop, because it teaches survival, Deviation, and building systems without punishing mistakes.
  • Way of Winter adds temperature as a survival stat on top of everything else, with tougher boss versions. Save it for after you have a Manibus run or two under your belt.
  • Evolution's Call and Prismverse's Clash are PvP-focused, the former built around Stronghold Conquest and the latter a fast, compressed faction war. Neither is a beginner scenario; both assume you already know the systems and just want to fight other players for them.

If a new season has just launched, like Season 4's "The Riftwalker", Manibus is still the right starting point even with new zero-gravity content layered on top.

Get Your First Deviations Early

Deviations are Once Human's companion system, and a couple of cheap early ones do more for your survivability than several hours of grinding gear.

  • Butterfly's Emissary is handed to you early and marks enemy weak spots during your attacks, amplifying damage they take. It is a strong default for almost any gun build, so equip it the moment you have it.
  • Festering Gel is the Deviation most experienced players grab first every new season. It drops a fortification that blocks damage and restores HP and sanity, a cheap and dependable survival tool whether you are playing solo or in a group.

Once those two are in your loadout, you have a meaningfully safer combat and exploration baseline than a fresh-spawn character.

Automate Your Base Before You Push Further

Once Human rewards setting up a small automated base early rather than manually gathering everything by hand:

  • The Digby Boy is the single most valuable Territory Deviation for resource efficiency. Place it in an Isolated Securement Unit and it passively gathers ore with no input from you.
  • Logging Beaver does the same job for wood. Capture it near Margerie's Store at Broken Delta and pair it with the Digby Boy so both core materials flow in while you explore.
  • Nutcracker is the standard base-defense Deviation, roaming your base and attacking incoming enemies during purification waves. If you are on a PvP-adjacent server or just do not want to lose progress to a surprise attack, get one early.

This trio turns your base into something that keeps producing while you are off doing the things that actually matter: exploring, fighting bosses, and chasing rarer Deviations.

Take Down Your First Great One

Great Ones are Once Human's world bosses, and not all of them are beginner-friendly. The Treant, sealed in the Gaia Cliff Monolith in the Broken Delta, is one of the most-fought Great Ones precisely because it is approachable: it roots players and summons adds, so the fight is mostly about staying mobile and clearing spawns rather than surviving a brutal damage check. It is also a popular farm target for materials once you can beat it consistently, which makes it a good repeatable goal rather than a one-time milestone.

Once the Treant feels manageable, the Ravenous Hunter and Arachsiam are reasonable next steps; both demand more precise positioning, but neither requires the gear investment of late-game Great Ones like Rabizex.

Plan for Co-op Early

Once Human is meaningfully better with friends, and one Deviation makes group play frictionless: Space Turner produces Spatial Keystones used to craft Space Twisters, letting teammates teleport to you without spending Energy Links. If your group is splitting up to gather or explore different Great Ones, this single Deviation saves a huge amount of travel time over a session. Pair it with Pup Buddy for Featherweight Potions if your group does long loot runs together, since the extra carry weight adds up fast across a party.

First-Hours Checklist

Where to Go Next

Once the basics click, check the Once Human tier list for a full ranking of Deviations, Great Ones, and scenarios, and read up on the Season 4 Riftwalker update for what changed most recently, including the new zero-gravity floating-island combat and the latest economy buffs.

June 30, 2026 at 12:00 AM UTC
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June 30, 2026 at 12:00 AM UTC

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