[3] Rather than emulate games, the Mega Sg uses FPGA chips that replicate the original system hardware.

The Mega Sg features 1080p HDMI, digital audio (48 kHz 16-bit), and original Genesis-style controller ports.

Kevin Horton engineered Mega Sg to use an Altera Cyclone V to match the Genesis hardware logic with very high accuracy[citation needed] and also provided extra features, such as the option to scale the original 240p video output to different resolutions up to 1080p 60 Hz.

[5] It includes an unreleased Genesis game from 1994, Hardcore, renamed Ultracore due to licensing problems.

[10] The Guardian gave the Mega Sg four out of five, writing: "Playing Streets of Rage 2 or Comix Zone on this thing is like experiencing a remastered recording of a favourite album, or a digitally restored version of a classic movie ... the Mega Sg makes Sonic and all the other games I have tried feel fresh and contemporary.