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Graph TD: Cosmic

It is a strategy roguelike game. Use cards to form a graph of towers and nodes, tweak heat, power and other mechanics, and minmax what's in your hand. Reverse Earth's fate from the end of time.

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Release Date:

Dec 29, 2025

Developer:

GrandpaPit

Publisher:

GrandpaPit

	Interface	Full Audio	Subtitles
English	✔
Simplified Chinese	✔
Traditional Chinese	✔

Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

Leaving Early Access: Q4 2026

What the developers have to say:

Why Early Access?

“I need some feedback from the market and users to adjust the development of the remaining content.”

Approximately how long will this game be in Early Access?

“0.5 y ~ 1y。”

How is the full version planned to differ from the Early Access version?

“Full version is planned to have more levels. There may be new types of enemies, towers, maps, mechanics, and more story.”

What is the current state of the Early Access version?

“Current version features a fully playable core experience, with the first half of the levels, 60+ towers, 3 sets of enemies, and 1 character with text dialog.”

Will the game be priced differently during and after Early Access?

“Prices will rise .”

How are you planning on involving the Community in your development process?

“If you have any questions or comments, please leave a message on the Steam community or email the developer, and I will do my best to reply.”

Download Graph TD: Cosmic Demo

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Buy Cosmic Tower Defense Graph Theory

$7.99

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About This Game

At the end of the universe, you will pilot the "Graph Theory" to traverse through time and space, fending off the invasion of exotic biological substances and reversing the fate of Earth. This is not just an ordinary tower defense game - it's a strategically designed game with depth. Every deployment of nodes, power distribution, and heat management will determine your survival or demise.

Core Features

Complex and challenging strategic gameplay - resources are random and limited, requiring careful planning.
Spacetime scenarios - from the end of time to neutron star orbits, enemies come in various forms.
Diverse construction gameplay - towers can be upgraded in different directions, changing their functional roles (from support to main output). Arrange nodes and towers according to graph theory logic.
Physics simulation - from spring grids, thermal simulation to current simulation, all operate with an approximate simulation method at the underlying logic (not scientific at all).
Co-pilot system - choose a character to accompany you (currently only one available).
Permanent death roguelike mechanic - if the "Graph Theory" is lost, your consciousness will be teleported back to the end of time.
Driver cards - combine and upgrade drivers, placing them inside defensive towers to provide various bonuses.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Format reference, polish and localization

System Requirements

Minimum:

OS *: Windows 7 SP1 (32/64-bit) / Windows 10 (32-bit)
Processor: Intel Celeron G530 / AMD Athlon II X2 220 (1.8 GHz dual-core, x86/x64)
Memory: 8 GB RAM
Graphics: GTX1050
DirectX: Version 12
Storage: 1 GB available space
Sound Card: Integrated audio (basic audio output support)
VR Support: no
Additional Notes: no