BreakThrough Easy (No modded file needed) Cheats for Portal

Testing now 
Down, O, X, O, Triangle, Down, O, X, O, Triangle - Create A Cube (Confirmed by me )
Left, Left, Left, Left, L1, Right, Right, Right, Right, R1 - Unlock all levels (Confirmed By Me & in game appears to be Sv_cheats 1 )