The best replacement for sega is nintendo.

The best alternatives to sega are rated as following:
★★★★★  nintendo
★★★  accolade
★★  snes
★  nintendo anime
★  namco
★  nintendo avgn
★  ea
★  totalbiscuit
  nintendo saga
  ytmnd
  nes
  sega
  atari
  super nintendo
  nintendo first

Your alternative for sega is not listed? Suggest!
Speaking about sega, one probably shouldn't forget about tsc.

Other search terms related to sega and their ratings are:
★★★★★ tsc
You have in mind a companion for sega and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sega in all years. Click on graph for more.
sega
nintendo
accolade