Splinter Cell: Essentials is a hand-held "sequel" to Splinter Cell: Double Agent , with a story that explains the events after Double Agent and revisits previous missions from the original game's series, as well as flashback missions of his Navy SEAL days. The game includes nine missions to play in the story modes, as well as three unlockable bonus missions.
The core gameplay is still the same, using stealth and shadows to eliminate or subdue targets, collect information and such. The controls have been slightly modified for the PSP, with the analog used for movement and the d-pad for the inventory screen. A new feature allows players to pan around with the camera by holding the "O" button, while a single tap resets the camera back to the third-person perspective.
As before, gadgets such as night vision, thermal, lockpicks, and weapons from the previous games return. A new feature designed exclusively for the game allows players to challenge a human opponent via Ad-Hoc in an online spy vs. spy deathmatch.