If you don't know the recipient's Steam username, you can send gifted games directly to their email.

Steam gifting gets a major overhaul with guest checkout, email gifting, cross-region support, and smarter wishlist sharing.

Steam gifts and Steam wishlists get a fresh coat ...

Steam now lets anyone gift games without an account, while adding email delivery, cross-region gifting, and wishlist ...

Valve has just introduced wishlist categories, cross-region gifting, and options for email gifts and guest checkouts in a new ...

Steam gifting updates let you send games via email without creating an account. Valve will also phase out physical gift cards ...