O.P.C. Paris 1

Oberschwäbische Magnetspiele 1

Oboo du Roolo éditions 1

Octogo Games Ltd. 1

Octoko 1

Oddes Association 1

Odynaut Games 1

Oink Games 2

OKLA International 1

Okoïa - Addendo 1

Old Casa Games 1

Oldchap 9

Olga International 2

Olibrius 2

Oliphante 2

Oliver Games 1

Olpan Édition 55

Olympie 3

Omphales 1

On The Go Editions 4

TheOp Games 1

Open Mind 1

Jeux Opla 33

OPPI 2

Orang-Outan Cie et Co 6

Oratawa 1

Orca Games 1

Orcades 5

Orchard Toys 4

Orda Industries 12

Oriflam 4

Origames 21

Original Cup 1

Original Games 1

Orli Jouet 4

ORTF 2

Ortho éditions 1

Osprey games 1

Österreichisches Spiele Museum 4

Otobilis 1

Ouaps 3

Out of the Box 7

Outre tombe 1

Outset Media 1

Ouvea France 1

Ovomaltine 1

Owlydays 1

Oxers Games 1

Oya 20

Ôz éditions 2