Players take on the role of a protagonist in a post-apocalyptic world overrun by undead. The environment is a battleground, where survivors must fend off waves of aggressive creatures to survive.
The core mechanic involves using a variety of firearms to eliminate zombies from a first-person perspective. Players must strive to increase their chances of survival by using cover and strategic ammo management. Each zombie killed or wounded contributes to the player's score, as they must adapt to increasingly difficult horde waves.
The game can be played in a standard web browser without the need for download or registration, allowing players to jump into the action quickly. Siamese gamblers navigate narrow corridors, outdoor environments, and rooftops, crafting a fighting rhythm that pairs survival with the need to outlast.