Beginner Guide: What the Game Does Not Tell You

First, the thing that confuses everyone

You are not going to find a co-op button. Yet Another Zombie Survivors is single-player only. You command a squad of up to three survivors, but you command all of them, and they aim and fire on their own. The squad is a build system, not a lobby — the full explanation is here, including why the studio’s older Defense games did have online co-op and this one does not.

Once that lands, the game makes much more sense: you move, they shoot, and everything you actually control happens on the level-up screen.

Stack one damage type, do not spread across seven

The single biggest new-player mistake. There are seven damage types — Kinetic, Electric, Explosive, Slashing, Fire, Ice and Chemical — and each weapon and ability carries tags for one of them.

Tags are a counter with a threshold. The published example is Ice: past 10 tags, its effect chance is “5% +1% for every tag over 10.” Below the threshold you get very little; above it, the returns keep climbing. The achievement Going All In wants a single tag at 30 or higher, which tells you how far the game expects you to commit.

A squad with 12 tags in one type beats a squad with 4 tags in three types, every time. Pick a direction in the first few level-ups and stay in it. Full stat breakdown here.

Arenas unlock in a chain

You cannot jump to the newest content. The arenas gate each other, and Bio Lab — the version 1.0 arena — unlocks only after you clear Dead Terminal on Default mode. Boss Rush then unlocks after Hardcore, per map.

So the shortest route to everything 1.0 added is: clear the arenas on Default in order, then start running Hardcore. See all five arenas for the unlock chain and what lives in each one.

Do the missions, even if you skip the story

Between runs you get missions in the Briefing Room. It is tempting to treat them as optional narrative, but every mission you finish raises Team Bond — a permanent, squad-wide bonus to the Cash and Specialization Points every run pays out, capped at 250.

That makes missions the most efficient thing you can be doing early. The studio’s own framing was “Less grind, more lore!” — the story track is the economy track. Nothing is missable; the Mission Log lets you retry anything you failed.

Five things worth knowing on day one

1. Respecs are free. The achievement Forget It is awarded for resetting a skill tree, and its description literally reads “Free respecs!” Experiment.
2. Banish the junk. Item Pool Customization lets you remove items from your runs before you start. Cutting dead items raises the odds of drawing what your build needs.
3. Lockdown, banish and reroll are all on the level-up screen. Most new players use only reroll.
4. Survival Level is your real progress bar. It persists across runs and gates the ninth survivor, Ranger, at Survival Level 175.
5. Slowing the game down disables leaderboards. If you have bound the speed-down hotkey, your times will not post — that is intended behaviour, noted in patch 1.0.0c.

Which survivors to start with

You begin with SWAT, Tank and Engineer, none of which require unlocking. Engineer is the strongest of the three and the easiest to build around, because turrets do their work whether or not your positioning is good. Huntress, Ghost, Medic, Pyro and Mechanic unlock through play; Ranger is the long-term goal.

The survivor tier list ranks all nine, and is explicit about what the ranking is based on — published squad-wide effects and unlock gates, not invented damage numbers.

If something seems broken, check the patch notes

Four patches shipped in the first nine days of 1.0, and several fixed things that would look like your mistake: Ice Turret was not registering as Ice damage until 1.0.0a, SWAT’s Ricochet: Shattering was not dealing Slashing until 1.0.0c, the Monkey Business achievement did not work, and one Torment was mathematically impossible. The version timeline is here.