Games made with Custom built engine

There are 60 games made with Custom built engine. The top 10 largest game studios using this engine are: Kerberos Productions with 6 games, Sony Interactive Entertainment - 3 games, 10tons - 1 games, 2K Games - 1 games, 505 Games - 1 games, Activision Publishing - 1 games, Askiisoft - 1 games, Bare Mettle Entertainment - 1 games, BioWare - 1 games, Black Forest Games - 1 games.