Ecco Jr. is a video game in the Ecco the Dolphin series, released in Summer 1995. It had the controls and basic gameplay of the other two Mega Drive/Genesis titles, but was very much geared towards younger players, lacking the high difficulty of Ecco the Dolphin and Ecco: The Tides of Time.

Eggman the Dictator in Sonic the Hedgehog (aka Eggman in Sonic 1) is a rather interesting hack of Sonic the Hedgehog made by L0st - Sonic is replaced byEggman, who runs through the stages. Due to Eggman's larger sprites, the mappings and collision engine were rewritten from scratch, and Eggman also jumps at the same height and runs at the same speed, above and below water. As a result, Eggman cannot collect rings, open item boxes, destroy enemies, be hurt by objects or drown—the only way to kill Eggman is by landing on spikes, getting crushed, or falling off the screen (all three of which require a reset). Because of this, the hack is little more than a novelty, but is an impressive one nonetheless. Eggman can't use debug mode either, but Level Select still works. Also the Special Stages are unchanged, as Eggman can't enter Special Stages from the main game.

Eliminate Down (エリミネートダウン, Erimineto Daun?) is a horizontal scrolling shoot 'em up for the Sega Mega Drive developed by Aprinet and published by Soft Vision in 1993. The game gave players immediate access to three directional-based weapons that could all be powered up as they fought strange alien enemies through eight, enormous levels. The game was never released outside of Japan and South Korea.