Is portal a source game

Portal is a single-player Puzzle-Platformer developed by Valve Corporation.
Publishers: Valve Corporation, Microsoft Game Studios
Distributors: Electronic Arts, Steam
Composers: Kelly Bailey, Mike Morasky , Jonathan Coulton
Series: Half-Life
Engine: Source (Source is a 3D game engine developed by Valve Corporation)

If your asking if it runs the Source engine here is your answer.