64b57234___Roller_Coaster_Tycoon_3_Wiki__What_It_Does
[Option] Rides Have High Reliablity [What It Does] 
This one gives rides high reliability, but when they do break down, you have to manually call mechanics from the control panel, the rides will no longer automatically call mechanics.
The 'Options.txt' Cheats - Roller Coaster Tycoon 3 Wiki
What It Does