When does Over 9000 Zombies! get good?

Give it 2 hours. In the first 2 hours 1 in 5 reviews are negative (20%); after 4h it's 1 in 13 (8%). Fully opens up by hour 4.

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Over 9000 Zombies!

Feb 25, 2015 Steam: Very Positive

Give it 2 hours

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

Fully opens up by 4h rated like by long-time players

Started playing 38% of owners

Steam reviews 87% positive of 1,523

What the data shows

In the first 2 hours 1 in 5 reviews are negative (20%); after 4h it's 1 in 13 (8%).
Fully opens up by hour 4.
Only 38% 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 1,530 Steam reviews in every language. Median playtime in a sample of 292 reviews: 3.3h for positive, 2.1h 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 (37.6% of owners), so people who bought the game and never launched it don't count.

Story milestones aren't labeled yet; all achievements are listed below.

All achievements (43)

Survivor: Day 1 The first day is always the hardest, except in this case, it's the easiest. 100%
Pop pop pop, watchin' zombies drop! Get 10 kills per second! 95%
Survivor: Day 2 Making some progress... 94%
Survivor: Day 3 You won that race. 90%
MASSIVE DAMAGE! Get 5,000 damage per second! 89%
Survivor: Day 4 Green IS good. 86%
0MG I killed some Zombies! Kill 1000+ Zombies! 84%
Build a Turret! Construct a turret from scrap metal! 83%
Survivor: Day 5 You watched the world burn, and survived. It was kind of cool. 71%
Survivor: Day 6 Lots of progress! 66%
Survivor: Day 7 Not a wimp. 63%
Survivor: Day 8 It didn't taste like chocolate ice cream either... 60%
Survivor: Day 9 You didn't donate your organs... 57%
Safety in Numbers! Participate in a multiplayer game. 50%
Name of the Game! Kill 9,000+ Zombies! 50%
Survivor: Day 10 Your world didn't end! 49%
Survivor: Day 11 Don't call me slow! 47%
Terrible.. terrible.. DAMAGE! Get 15,000 damage per second! 43%
Survivor: Day 12 Quoth the Raven "Nevermore." 43%
Survivor: Day 13 Decreased Zombotropy. 42%
Survivor: Day 14 Blood and Flesh can be trusted. 40%
Dead Basset Kill over 1000 zombie dogs! 37%
Survivor: Day 15 A jail is an isolated system. 34%
Survivor: Day 16 If only he had the body of a horse... 32%
Broken Wings! Kill over 1000 zombie crows! 31%
Survivor: Day 17 Terror possessed me then! 31%
Slay Zombie Thomas Jefferson! Vote for Zombie Thomas Jefferson, or don't. 31%
Weak Spot Found! Kill over 1000 crabs! 31%
Total Carnage! Get 30 kills per second! 30%
Slay zombie Duke of Wellington! The army of the undead will march at daybreak! 30%
Slay zombie Mannerheim! Voted the greatest zombie of all time! 30%
Slay zombie Napoleon! Zombie Napoleon meets his zombie Waterloo! 30%
Slay zombie Sibelius! No 8th symphony for zombie Sibelius! 30%
Slay zombie Tchaikovsky! Derail the Waltz of the Undead! 30%
Survivor: Day 18 Health is the greatest gift, a close second is BRAINS! 29%
Survivor: Day 19 Abused patience turns to fury! 29%
Gimme a boost! Collect 100 Power Ups! 26%
Survivor: Day 20 The zombie world is independent of our will. 23%
Eye, eye! Kill over 1000 zombie eyes! 19%
Amateur Engineer! Construct 100 automated turrets. 8.5%
Undead Wasteland! Kill 90,000+ Zombies! 8.0%
1 Man, almost 1 million dead Kill 900,000+ Zombies! 5.6%
Make MacGuyver Proud! Construct 1000 Turrets from random scraps of metal! 5.3%

Steam page Updated: 2026-10-20.