Among the most influential of these games was Duck Hunt for the NES.

Back in the 1920s, players used to shoot light at targets equipped with special electrical sensors.

These have been around since before digital microprocessors were invented. They’re all presented in HTML5 so you won’t need to download or install them just select the gun game you’d like to play and get shooting!One of the most popular varieties of gun game is the light-gun game. Whether it’s a side-scrolling blaster like Contra, or something three-dimensional like Unreal Tournament, gun games have been consistently popular for decades.This part of the site is home to our selection of high-quality gun games. That's a shot in the dark, especially since the creator of that games website has a ton of web apps, they might have an internal web engine.Over the years, there have been hundreds, even thousands of games featuring guns of some sort. They do have webassembly code which could mean they use an engine that can output wasm? I don't know much about webassembly except that people like it when it works. Krunker doesn't seem to use anything that I can pick out.

Specifically, miniroyale seems to use WebGL engine called play canvas which seems pretty powerful from the 20 seconds I looked at the website. Multiplayer support is done via websockets which is a fair amount heavier than a UDP socket most games use but actually is easier to make reliable, so if anything multiplayer support on a browser can be easier in some ways. Loading instantly is just hiding loading which is can be done if you prioritize it. They also are design to fetch code as fast as possible since that's all webpages are. With webGL where its at, modern webbrowsers are extremely capable rendering engines. The short answer? Time, good programming and platform really.

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