Second-party
From Styleguide
second-party
When a game developer is not wholly owned by a videogame console manufacturer, but has an exclusive relationship with that manufacturer, it is referred to as a second-party developer for that manufacturer. Games developed by second-party developers are second-party games.
Second-party should only be used as an adjective, and never as a noun. Rare ended its second-party relationship with Nintendo when it was purchased by Microsoft. NOT: Rare stopped being a Nintendo second party when it was purchased by Microsoft.
Make sure it's clear which company a second-party developer is working for, either explicitly or by context. Insomniac is one of Sony’s many second-party developers.
Example: A series of relationships with second-party developers helped Sony get a bevy of exclusives for the PlayStation.
Wrong: secondparty, second party, 2nd party, Second-Party.
Also see: developer, first-party, publisher, third-party
