Happy Z-Day

Short description

Today is supposed to be your daughter's birthday, But something happened in this town. Almost everyone has turn into a Monster. You need to protect your daughter and her birthday party!

Developer: ImagiT Games
Publisher: ImagiT Games
Release: Mon, May 03, 2021
Price: $2.99
Reviews: 3
Positive: 100%
Followers: 105
Owners (estimated): 20K – 50K
Concurrent players: n/a
Genres: Action, Indie, Strategy
Tags: Third-Person Shooter Tower Defense Zombies Shooter Strategy Hack and Slash 3D Third Person Isometric Horror Base-Building Action Management Building Survival Physics Combat Resource Management Singleplayer Indie

Revenue (estimated, gross)~$404somewhere between $179 and $150k · roughly 60–50K copies

Review count and SteamSpy's owner range disagree, so the band is widened to cover both rather than picking a favourite. Multiplied by the $2.99 launch price — there is not enough price history for this game to weight the copies by what they actually sold for. Before Steam's cut, VAT and refunds. How these numbers are calculated.

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Media

History

Tracking started Sep 22, 2026. Charts appear once there is more than one data point — nothing has changed since.

How crowded is this niche?

How full the niche around Happy Z-Day is — measured on the tags it leads with, against every other combination on Steam.

±?? Third-Person Shooter + Tower Defense + Zombies

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Similar games that found an audience

Games sharing at least 3 of this title's leading tags, with enough reviews to have gone somewhere. Ranked by how much they overlap, not by how big they are. − missing and + extra mark the tags each one does not share with Happy Z-Day. Studio counts the titles that developer has released — the closest thing to production scale that public data allows. It is not a budget, and nobody publishes those.

Name	Studio	Shared	Tag difference	Price	Reviews	Positive	Released	Revenue (estimated)
Plants vs. Zombies GOTY Edition	PopCap Games 27 titles	3	− Third-Person Shooter − Shooter − Hack and Slash + Singleplayer + Casual + Classic	$4.99	144,336	98%	Tue, May 05, 2009	$22.8m $13.2m – $22.8m
Plants vs. Zombies: Battle for Neighborville	PopCap 2 titles	3	− Tower Defense − Strategy − Hack and Slash + Multiplayer + Hero Shooter + Casual	$29.99	15,396	72%	Thu, Jun 04, 2020	$24m $24m – $29.6m
Orcs Must Die! 3	Robot Entertainment 6 titles	3	− Zombies − Shooter − Hack and Slash + Co-op + PvE + Action	~~$29.99~~ $7.49 75%	10,970	85%	Fri, Jul 23, 2021	$13.2m $5.9m – $134m
Zombie Army 4: Dead War	Rebellion 43 titles	3	− Tower Defense − Strategy − Hack and Slash + Action + Multiplayer + Co-op	$49.99	10,196	87%	Thu, Feb 18, 2021	$20.9m $20.9m – $34.1m
Necrosmith	Alawar 34 titles	3	− Third-Person Shooter − Shooter − Hack and Slash + Action Roguelike + Rogue-lite + Bullet Hell	$2.99	4,873	86%	Wed, Jul 13, 2022	$614k $273k – $2.8m

There are more like this. Your plan shows the 5 closest neighbours; Plus and Pro show up to 100 — enough to see the shape of a niche instead of a sample of it.

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