From great stealh game to above average casual stealth action... Make sure you play Conviction on Realistic.

Tom Clancy's Splinter Cell  
Metacritic: 93 (Xbox) 

Tom Clancy's Splinter Cell: Pandora Tomorrow
Metacritic: 93 (Xbox)

Tom Clancy's Splinter Cell: Chaos Theory
Metacritic: 94 (Xbox)

Tom Clancy's Splinter Cell: Double Agent
Metacritic: 85 (Xbox 360)

Tom Clancy's Splinter Cell: Conviction
Metacritic: 85 (Xbox 360)