400 | Devpost

Inspiration

Inspired by the cliffhanger at the end of the Three Body Problem book by Liu Cixin: given a set amount of time to prepare for an inevitable alien invasion & The Little Prince by St Exupery. Also, as physicists: actually numerically simulating the N body problem and implementing it into the game as the way to move around!

What it does

You play as the captain (from generation to generation) of a space ship, and your aim is to prepare the planetary systems around you by equipping them with space defense fleets.

Unlike your usual WASD game, you have to think in terms of orbits: propulse yourself around using their gravitational attraction, exploit the chaos of the N-body problem.

Use your weapons to defend your ship against local opponents, interact and get to know the planets' inhabitants - ultimately: protect your legacy against the invader, in the final conflict between two worlds.

How we built it

The game was build entirely in GODOT. Roles were sectioned as the following:

solving the physics and implementing accurate gravitational interactions
making the ship: drones that follow it, interacting with and assigning fleets to planets, shooting and moving around
coding the enemies: making them spawn, pursue and attack you -art: turning people in Durhack into character sprites

Challenges we ran into

Collaborative coding and conflicts on the same files using GitHub for the first time

Accomplishments that we're proud of

Accomplishing the development of a game: story, interactiveness, timeline, with all the implemented physics

What's next for 400

Developing it into a full-fledged game on Steam!

Built With

github
godot
krita

Submitted to

DurHack X

Created by

I worked on the player movement, shooting interaction UI, minimap and sprite designs. A majority of my time was spent building the systems upon which we’ve built this demo though!

Mehmet Ekin Doğan
I implemented the modular enemy and planet spawning and gravity systems. I also did the enemy AI and weapon targeting. I created the planet system based on Owen's calculations so the orbits would seem as realistic as possible. I also designed the enemy and weapon sprites using Aseprite.

Wildeofthewest1
Worked on the art using Krita and wrote & included the dialogue for the interactions in Godot. Moral support and jokes too.

Isabella Castel-branco
I worked on a preliminary gravity system for the setting of the game. There is still a lot more I have to learn about using Godot - daunting, no doubt frustrating, but overall it expanded my skillset

owen Fung

Updates

Wildeofthewest1 posted an update — Nov 05, 2025 11:59 AM EST

Ekin and I are continuing to develop 400 into a fully fledged game, since Durhack we have fixed many issues we experienced in the initial version. We have created a game design document to include our ideas and what we plan to add to the game next.

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Isabella Castel-branco started this project — Nov 02, 2025 05:26 AM EST

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