My two shareware games are written on Delphi.
AirHockey 3D - air hockey
http://avagames.net/airhockey/air-hockey-download.htm

and
Scorch an Island - a remake of Scorched Earth :
http://avagames.net/tank_battles/tank_battles.htm

Actually many of shareware games written on Delphi - for example very successful Rainbow Mystery and other games by Sugar Games seems to be written on Delphi.
http://www.sugargames.com/