Crossplay

Is Fallout: New Vegas - Courier's Stash crossplay?

Crossplay does not apply to Fallout: New Vegas - Courier's Stash: it has no online multiplayer.

Courier's Stash is a Fallout: New Vegas add-on released on September 27, 2011, alongside Gun Runners' Arsenal. It is a compilation of the four item packs that were previously released as bonuses for pre-ordering the game at certain retailers. It contains multiple new weapons, armors, and a supply of aid items, such as stimpaks and doctor's bags. It is also available to those who have bought the Ultimate Edition of Fallout: New Vegas.