When does ZERO Sievert get good?

Give it 3 hours. In the first 2 hours almost 1 in 2 reviews are negative (42%); after 15h it's 1 in 8 (13%). The game has no story achievements, so drop-off points can't be measured.

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ActionAdventureIndie

ZERO Sievert

Oct 23, 2024 Steam: Very Positive

Give it 3 hours

Gets good by 3h almost every game dips in hours 2–3

Started playing 65% of owners

Steam reviews 85% positive of 15,677

What the data shows

In the first 2 hours almost 1 in 2 reviews are negative (42%); after 15h it's 1 in 8 (13%).
The game has no story achievements, so drop-off points can't be measured.
Only 65% of owners have even the first achievement — the rest barely played.

When it gets good

Share of positive reviews by how many hours the reviewer had played when writing the review.

before it gets good opening up fully opened up

Based on all 15,778 Steam reviews in every language. Median playtime in a sample of 299 reviews: 32.1h for positive, 14.6h for negative. Almost every game is rated lower in the first 2–3 hours: that window includes refunds and quick first impressions. What matters is how deep the dip is and how fast the game recovers.

Where players quit

Share of players who started the game and reached each story milestone. 100% is the most common achievement (64.8% of owners), so people who bought the game and never launched it don't count.

This game has no story achievements, so we can't tell where players quit.

All achievements (59)

story milestone ending side

First Blood Defeat your first enemy 100%
That Must've Hurt Die for the first time 88%
All that for a Drop of Blood [Heal bleed]/[Heal HP] at 10HP or less 64%
Blacksmith Craft your first item 59%
Scavenger Open 50 containers 55%
Lost in the Woods Defeat Lazar in the forest zone 44%
Finder Keepers Loot from 10 Hidden Stashes 44%
Pest Control Kill 50 animals 44%
Gun for Hire Complete 10 quests 44%
Done Deal Complete 50 trades 44%
Man about Town Complete 5 daily quests 43%
Ghoulbusters Defeat 100 ghouls 38%
Down with the Sickness Complete the quest ‘Radiation Effect’ 35%
Best Friends Reach maximum relationship with any faction 33%
A Big Win Defeat a big for the first time 31%
Eye for an Eye Complete Igor's questline 31%
Ready for Action Complete the Prologue 30%
Headhunter Defeat 1000 enemies 26%
Camper Eliminated Defeat Arman in the makeshift camp 24%
All Aboard! Board the train 100 times 24%
Maxed out: Rifle Reach maximum level for rifles 21%
Can I Speak to the Manager? Defeat Kibba, the boss of the mall 19%
Skin in the Game Unlock your first Train Skin 17%
Heavy Pockets Hold 1 million Roubles at once 17%
Handyman Repair 50 items (armour or weapons) 16%
Lab Assistant Obtain 450 reputation with Scientists 15%
Rock Bottom Hold less than 10 Roubles at once 15%
Welcome To Zakov City Enter the city map 13%
Signal Found Complete "Get some Music" quest 12%
Way, Cleared Defeat Orel, leader of the Makeshift Camp 9.7%
Maxed out: Sniper Reach maximum level for sniper 9.4%
One Man's Trash Find Mr Junk 9.4%
Die Trying Die 100 times 9.3%
Pirate Radio Play your first track on the radio 8.0%
Maxed out: Shotgun Reach maximum level for shotguns 6.9%
Aliens Exist Kill 182 Blinks 6.6%
Maxed out: SMG Reach maximum level for SMGs 6.3%
Nothing but Junk Litter the ground with 1000 bullets in one raid 6.2%
Maxed out: DMR Reach maximum level for DMR 5.7%
Hoarder's Paradise Fill any container to 1000+ of a single item 5.6%
Beat Around the Bush Defeat the Phantom of the Swamp 4.5%
Dead Drop Loot the Phantom's Hidden Stash 4.0%
Hail to the Rotking, baby Defeat Rotking, who hides in the Sewers 3.4%
Crystal Clear Defeat the Outer Deity 3.2%
Maxed out: Pistol Reach maximum level for pistols 3.1%
Last Orders Complete all of the Barman’s quests 2.9%
Into the Unknown Complete Unknown's Questline 2.3%
My Bloody Valentine Defeat Valentine in Zakov City 2.3%
Made Devil Cry Defeat the Devil in the Parking Lot 2.2%
Milkrun Fill your inventory with milk 1.7%
Expand your Horizons Defeat Voss, Commander of Horizon 1.2%
Corporate Climber Complete Crimson Corporation Questline 1.1%
Iron Man Complete the game with permadeath enabled 0.9%
Shadow of Zakov Complete the Secret Ending 0.8%
Nuclear Powered Travel to the Nuclear Power Plant 0.8%
Shine on you Crazy Diamond Defeat the Inner Deity 0.6%
Not Easy Being Green Complete the Green Army's Questline 0.6%
Fashion Show Own each of the Bosses' unique armors 0.3%
Railway Collector Unlock all six Train Skins 0.3%

Steam page Updated: 2026-10-18.