The PC Engine CoreGrafx Mini - or TurboGrafx-16 Mini if you're in the US - looks great but won't win you over if you're not already nostalgic.
PC Engine Coregrafx Mini (Turbografx 16) Review
PC Engine - TurboGrafx 16 Mini & Games Review -Best Mini Ever?
PC Engine Mini Review - Incredible games, high price and lacking controllers - Daily Star
PC Engine CoreGrafx Mini review – Tired Old Hack
PC Engine Mini Review - Incredible games, high price and lacking controllers - Daily Star
PC Engine CoreGrafx Mini Review: A Contender For Gaming's Best Mini-Console - GAMINGbible
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PC Engine Mini Review & Thoughts
PC Engine CoreGrafx Mini review - Tech Advisor