Hi everyone! We're PRIMARY SYSTEM, an independent studio from Korea, and we just released our first game on itch.io: 5019, a free real-time strategy game about fleets, landings and the old powers of the sea.
https://primarysystem.itch.io/5019
After the fire, the fourteenth century came again — and the old powers of the sea woke with it. You lead the last expedition across a drowned archipelago: gather corn, raise settlements, build ships, carry your army over open water and take the land, while rival realms raid anything you leave unguarded and the sea itself fights back.

- Fleets and landings — every army crosses the sea by ship
- Sharks, orcas, the megalodon, the kraken, Poseidon and the Leviathan
- Armies up to 1,000 strong — spearmen, arquebusiers, field cannons, galleons, biplanes and submarines
- A season-long campaign, three difficulty levels, English and Korean
It's free (pay what you want) for Windows and macOS. It isn't code-signed yet, so Windows may show a SmartScreen warning on first launch — "More info" → "Run anyway".
Disclosure: we used generative AI tools for parts of the graphics, sound and code.
We'd love to hear what you think, especially about balance and difficulty. Thanks for reading!