if you didn't go to the party , and didn't check on claudia , and didn't open door , u get a bad end , its nothing much , just a ss saying claudia went missing with a sketch showing she lying on the porch. I couldn't get the last one , so i did a cheat and extract the images. It seem like its the same bad end except the diff i is claudia was wearing the provocative dress which is a problem for me , since if she wear the provocative dress , the MC sure go to the party and there no way to trigger her being lock out...
I suspect u must fall out with Victor , but I am too lazy to try out since its the same thing except with a diff dress, not worth the effort.
But like i said its nothing much just a single screen shot sketch bad ending, you don't miss anything.