Because Stardew Valley is written in it. Probably half of modern games are written in C#, too (Unity). It's not exactly an odd choice.
> Isn't the big tech (Microsoft) in this case is a very big downside?
No, a language being backed by big tech is a plus as long as the stack is fully open-source (which .net now is).
> Why not LÖVE (Lua) for example?
Because Stardew Valley uses MonoGame, not LOVE.
> There is also libGDX (Java) but not sure Oracle is any better than Microsoft.
Other than Minecraft, can you name one successful game written in Java?
The other major one would be RuneScape.
Because Stardew Valley is written in it. Probably half of modern games are written in C#, too (Unity). It's not exactly an odd choice.
> Isn't the big tech (Microsoft) in this case is a very big downside?
No, a language being backed by big tech is a plus as long as the stack is fully open-source (which .net now is).
> Why not LÖVE (Lua) for example?
Because Stardew Valley uses MonoGame, not LOVE.
> There is also libGDX (Java) but not sure Oracle is any better than Microsoft.
Other than Minecraft, can you name one successful game written in Java?