Splinter cell pandora tomorrow puts just as much emphasis on single player mode as multiplayer mode. Correct me if im wrong but I think it has a meaty campaign mode as well as a well thought out multiplayer mode.
Here at the official splinter cell website it doesnt even mention the multiplayer mode.
"Covert stealth-action featuring a compelling original storyline and characters inspired by the world of Tom Clancy and endorsed by the famous author.
Revolutionary lighting, shadowing, animation, physics, and sound effects create an astonishingly realistic tension-filled experience.
Comprehensive stealth techniques including sniping, split jumping, zip lining, rappelling, and using human shields bring gameplay possibilities to a new level.
Experimental intelligence gadgets (night/thermal vision goggles, prototype weapons and surveillance gear, etc.) give Fisher the edge against his enemies."
http://www.splintercell.com/us/gameinfo-features.php#1