I thought unity was mostly written in either C# or an EcmaScript flavour?
Re:Open-Sourcing ClusterFuzz
by ritz_labringue on Friday February 08, 2019 @11:58AM
(#19116181)
Unity itself (the engine) is written in C++. Game scripts are written in either C# or UnityScript iirc.
Although the engine is currently written in C++, they are in the process of rewriting parts of it in C#, with help of their HPC# subset and Burst compiler, having some ex-Insomniac Games developers like Mike Acton on the team.
Web apps, almost certainly no.
ClusterFuzz (and fuzzing generally) is most useful for finding bugs in C/C++ code so maybe it could work for unity games? I don't know much about them though.