I don't like any of the alternatives. Why the obsession with biscuits? It's neither catchy nor funny, in neither sound nor meaning - but that's what it needs for people to remember your company and associate your team with your games.

I quite like the Wet-Sock suggested by SuperVGA,

Wet-Sock Studios has a nice ring,

I know it wasn't one of the options but ah well....................

I voted for Soft Biscuit because Play Attic sounds like your games are ancient (attics remind me of old shit) and I just hate Soft at the end of names. Plus, Soft Biscuit sounds funny.
PS. (It kinda got a double-meaning)

Change it to Limp Biscuit and sell erectile disfunction medication via e-mail broadcast.

EDIT: but seriously, totally agree with Way2Lazy, just shorten it to "Biscuit" or "Team Biscuit" or something if it ain't taken.