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Terrorhedron Tower Defense

Terrorhedron Tower Defense

Terrorhedron is the 3D, cooperative tower defense game for the PC. Unmatched challenge and complexity is introduced to the genre through 3 dimensional gameplay, micro-strategy through programmable turrets and 'edge of seat' gameplay is extended to multiplayer with up to 8 players online co-op.

Released Jul 24, 2014 Developer Dan Walters Platforms Windows Tower DefenseIndieStrategyCasualGreat Soundtrack
View on Steam ↗ $1.99 (US · as of 2026-07-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.

84.1%positive1,171 reviews
Recommended · 0 found this helpful

“Exciting tower defense with funny monsters and engaging levels. makes you nervous and laugh at the same time. perfect for fans of tactics and humor. keeps you hooked and entertained!”

— a player, Steam review · 10 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live count fetched 2026-07-23 23:55 UTC · history via SteamCharts.

0playing at last check
745all-time peak
0 50 100 2015 2017 2019 2021 2023 90 avg · May 2015

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.

47achievements
8.5%median completion
5.3%rarest: Summit - Diamond
40.5% of players 32.6% of players 30.8% of players 29.3% of players 27.7% of players 26.3% of players 25.2% of players 23.4% of players 22.2% of players 20.2% of players 18.8% of players 17.4% of players 16.3% of players 14.1% of players 13.3% of players 12.7% of players 12.0% of players 10.8% of players 10.8% of players 10.2% of players 9.7% of players 9.4% of players 9.2% of players 8.5% of players 8.3% of players 8.2% of players 7.6% of players 7.6% of players 6.8% of players 6.5% of players 6.5% of players 6.3% of players 6.2% of players 6.0% of players 6.0% of players 6.0% of players 5.7% of players 5.7% of players 5.5% of players 5.5% of players 5.5% of players 5.4% of players 5.4% of players 5.4% of players 5.3% of players 5.3% of players 5.3% of players 40.5% 0% most earned rarest
Almost everyone has
40.5%Laser Turret - Level 1 — The level 1 laser turret fires a single laser shot.
32.6%4-Face Turret Platform — The 4 faced platform is an expander piece for placing other turrets on, arranged in a pyramidal formation.
30.8%EMP Turret - Level 1 — The level 1 EMP turret drains its target's energy, slowing it down to three quarter speed.
Rarest badges of honor
5.3%Summit - Diamond — Complete Summit track on expert difficulty
5.3%Spiral - Diamond — Complete Spiral track on expert difficulty
5.3%Scramble - Diamond — Complete Scramble track on expert difficulty

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-25. Steam prices vary by region — always confirm your local price on Steam.

$1.99current · sampled 2026-07-26 08:39 UTC
$1.99lowest since tracking began2026-07-25
US1.99 USD
EU1.99 EUR
UK1.69 GBP
Australia2.95 AUD
Canada2.59 CAD
Japan235 JPY
Brazil6.99 BRL
China11.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$1.4 Japan China Canada US Australia UK EU≈$2.3

Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

May 10, 2015
Trading Cards!

Hi everyone! We just added trading cards to Terrorhedron! Please enjoy, and let me know what you think. Cheers, Dan

May 10, 2015
Trading Cards!

Hi everyone! We just added trading cards to Terrorhedron! Please enjoy, and let me know what you think. Cheers, Dan

May 03, 2015
Steam Lobby Support Added!

Hi all, We just added Steam lobby support, meaning when a friend is in the lobby stage of a game, you can connect by using the "join game" option on the Steam friends interface. Things to note: You ca

May 03, 2015
Steam Lobby Support Added!

Hi all, We just added Steam lobby support, meaning when a friend is in the lobby stage of a game, you can connect by using the "join game" option on the Steam friends interface. Things to note: You ca

Jan 09, 2015
We bring you updates!

The latest update to Terrorhedron fixes some bugs kindly reported on the forums. Previous updates include adding support for Windows XP. Thanks to all who supported the game thus far, and if you are a

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-20.

GenresCasual, Indie, Strategy
Player tagsTower Defense · Indie · Strategy · Casual · Great Soundtrack · Online Co-Op · Multiplayer · Co-op (SteamSpy community voting)
FeaturesSingle-player · Multi-player · Co-op · Steam Achievements · Steam Trading Cards · Steam Cloud · Family Sharing
LanguagesEnglish
Achievements47
Estimated owners200,000 – 500,000 (SteamSpy)
Official sitehttp://mcro.org/terrorhedron
Minimum system requirements (PC)

Minimum: OS *: Windows XP or later Processor: Core 2 Duo Memory: 2 GB RAM DirectX: Version 9.0c Storage: 300 MB available space