The retro engine is the best way to play the original Sonic the Hedgehog. Originally only playable on mobile phones, then later on other platforms via Sonic Origins. This is a full port of Sonic the Hedgehog to a new game engine, built specifically so the game can work better at higher resolutions and without the need for emulation. All the sound is recorded so it plays perfectly based on the original sound from the Mega Drive.

It also runs in widescreen or pretty much any size and shape you need to fit your screen. Options for the Spin Dash are added and you can unlock Tails and Knuckles to play as, with new parts added to the game to work with their different play styles.

The main controls are a simulated touch screen analogue stick and button, which isn’t ideal, but these are still the best simulated controls I’ve seen. You can change size, opacity and location. The analogue stick functions a short distance away from it so you don’t have to worry about moving too far from it, while the jump button is mainly for show as any press in the bottom right of the screen will activate it. After a couple of levels, you should have no issues making them invisible and still using the touchscreen. Of course, it’s still better to connect a controller.

This version of Sonic 1 is a brilliant port.