Shenmue 1:
- Trigger all the flashback scenes on the first day
- Find the Sega Saturn
- Get high scores in arcades
- Win a forklift truck race
- Experiencing 'secret' events/cutscenes/fights you can miss
- Name the kitten
- Winning prizes in the raffle
- Beat Chai in the Arcade
- Spar with Fuku San every day
- Make it to Christmas Day
- Speak to Santa Claus
Shenmue 2:
- Find Wang's brother
- Trigger Fangmei's birthday
- Unlock duck race
- Win duck race
- 'Make it out of the cave' (triggered if a Shenmue 3 save file is detected on the hard drive
)
I'm sure there's more I'll think of later