My all time favourite has to be the original Geoff Crammond Formula One Grand Prix. I originally had the demo version, which allowed three laps around Monaco as “Robert Davies” (Mansell), battling with “Carlos Sanchez” (Senna) and “Jean Paul Cassell” (Prost).
Then came the full version, with circuits that not long after disappeared from F1 altogether (Phoenix, Arizona & Mexico City). It was truly the grandfather of the games we have today – not only was every twist and turn of the circuit faithfully reproduced, it introduced car dynamics/damage, trackside architecture and wet weather conditions. I remember putting the settings on full, for full length races and being happily engaged for hours.
Plus, it was the last season in which Senna, Prost, Mansell and Piquet all raced together – can’t ask for more than that.
Once GP2 was out, it also got a good battering from me, as does GP4 today! I echo the support for the Playstation F1 ’97 too – it was perhaps the first really “playable” game that came out on the Playstation, I think. Many happy memories!