What does SSE stand for?

Subspace Emissary (gaming; Smash Bros.)

This definition appears very rarely and is found in the following Acronym Finder categories:

Slang/chat, popular culture

Other Resources:

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State Signaling Event Static Source Error (aircraft) Stationary Source Enforcement Steady State Economy Steady State Error Sterile Speculum Exam Stockholm School of Economics (Stockholm, Sweden) Strategic Systems Engineering Streaming SIMD (Single Instruction Multiple Data) Extensions Structural Systems and Engineering		Substantial Shareholder Exemption (finance) Sum of Squared Error Sum of Squares due to Error Sun Sensor Electronics Sunrise Sports and Entertainment Supervisor's Safety Education Support System Evaluation Support Systems Engineering (Sprint) Sussex School of Education (UK) System Safety Engineering

Samples in periodicals archive:

There's even a single player in the form of the Subspace Emissary mode, which has some of the most amazing cinematics to grace the Wii.

The best brawling on offer

The main single player game is entitled Subspace Emissary - an entertaining platforming/fighting story-driven adventure.

REVAMP WILL BE SMASH HIT; Scott Munro's games round up New look game ...

There is also the Subspace Emissary mode - similar to a side scrolling platformer - third party characters such as Sega's Sonic and a lag-free online mode, while a level editor allows you to create you own fiendishly designed stages.

GAMES: IT'S A KNOCKOUT; GAMES FANCY SEEING PIKACHU TAKE ON SONIC? NOW ...