sdlBasic

From 2017 onward, several No Time To Play games have been made with sdlBasic:

(Glittering Light also got a good-looking desktop port in sdlBasic, but it was discontinued for lack of interest.)

The language itself is documented in a couple of articles, both part of the Game Programming Interfaces book:

Space Cruiser Orion also spawned a couple of small yet useful sdlBasic libraries (hosted at GitHub):

As of spring 2019, the language hasn't had a new release in three years, and it's full of quirks, not to mention bugs. Yet it continues to prove very useful, and the community is as helpful as ever.