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