We use a listing order of 50 so that, if all of the other credits use the defaults, we appear after the game's own credits (conventionally at listing order 1) and before any extension credits (which inherit the default order 100), but so that there's room for extensions that want to appear before us, or after us but before any default-ordered extensions.

Use a very high listing order so that we're the last thing shown.

An ID module not for the library but for the T3 VM itself. This doesn't display any credit information, but displays version number information for the VM so that the "version" command shows what version of the interpreter is in use.