Concerning my previous question Non simply connected HyperKähler 4manifolds without ALE metrics the following question occurred to me:
Is there any open Ricciflat ALE 4manifold other than HyperKahler ALE 4manifolds?
Concerning my previous question Non simply connected HyperKähler 4manifolds without ALE metrics the following question occurred to me: Is there any open Ricciflat ALE 4manifold other than HyperKahler ALE 4manifolds? 


See Ioana Suvaina, ALE Ricciflat metrics and deformations of quotient surface singularities, Remark 4.5 (this reference was also in one of the answers to your previous question). 

