
appMalloc:size=-23379820 (total=334 Mbytes) <- FArray::Empty:-5844955 x 4 <- TArray::SerializeSimple <- TArray::Serialize:0/1084455754 <- FSkeletalMeshVertexInfluences<< <- TArray::Serialize:0/32 <- FStaticLODModel3<< <- TArray::Serialize:0/1 <- USkeletalMesh3::Serialize <- LoadObject:SkeletalMesh3'Prop_Mushroom0006_SF.SK_Prop_Mushroom0006', pos=6BF6, ver=861/19, game=ue3 <- UObject::EndLoad <- CUmodelApp::ShowPackageUI <- Main:umodel_build=874
and this happens with the same file from OP

appMalloc:size=1031059940 (total=130 Mbytes) <- FArray::Empty:1125294821 x 20 <- TArray::Serialize:0/0 <- FSkeletalMeshVertexInfluences<< <- TArray::Serialize:0/32 <- FStaticLODModel3<< <- TArray::Serialize:0/1 <- USkeletalMesh3::Serialize <- LoadObject:SkeletalMesh3'LastBoss_Escalator.SK_BG_Cafe_Fortmachine_Tetsuo', pos=1BDEC8, ver=861/19, game=ue3 <- UObject::EndLoad <- CUmodelApp::ShowPackageUI <- Main:umodel_build=874
I'm not exactly sure which UE runs on this game, I seen on wikipedia its on UE4, but from what I see on the files, it seems UE3.
i've tried with only skel mesh and textures enabled.