BankThe bank in RuneScape Classic was much more difficult to use. For example, players could only withdraw or deposit limited amounts of items at a time, so trading large amounts of items was very time-consuming, however, Jagex has recently begun to update RS Classic and has added a deposit/withdraw "X" option . Also, since only one player could talk to an NPC at any given time, using the bank in crowded trading areas was very tricky and was very time consuming.
Fatigue was introduced to combat autoers. Using skills would increase fatigue until it reached 100%, at which point players could not receive any more experience, making it impossible to train for certain periods of time. Players were taught about fatigue by the Fatigue expert. At first players could only reduce it by sleeping in beds located in nearby houses or buildings, but then after a while sleeping bags were introduced. They did not reduce fatigue as quickly as beds. Either way, it was necessary to type in a random word to wake back up again. It was introduced shortly before RuneScape.
The concept was greatly disliked despite the fact that the time it took to actually train skills was balanced by taking less attempts to successfully mine rocks and catch fish. It went through a few revamps before being dropped entirely in the transition from RuneScape Classic to RuneScape 2. It was believed to have been dropped because most if not all autoers had programs called "autosleepers" that would type the random word in. Currently RuneScape Classic has a program where if players stand in one spot for too long, they will be logged out. The removal of fatigue in RuneScape 2 also came about due to the addition of Random Events, which were designed to prevent large-scale macroing/autoing.
CertificatesBefore RS2, trading large numbers of items was much more of a hassle. At first, the only way to create stackable items out of those that couldn't be stacked normally was to turn them into certificates, or "certs" as they were referred to. Lobsters, sharks, coal, and certain logs could be traded for certs - 5 items for 1 cert. This was done by Niles, Giles, and Miles. Nowadays, in RS2, these certs are replaced by notes, which can be withdrawn from a bank in the form of a piece of paper with a picture of the item and a number on it, and many items can be withdrawn as such. With the creation of new random events, Niles, Giles, and Miles can be seen making cameos as a Random Event. The "certs" remain the only way to transfer large amounts of items in Classic.
Holiday dropsThe holiday drops, which produced rare items, began in RuneScape Classic. In order of appearance, they were: pumpkins, Christmas crackers (containing partyhats or other items), Easter eggs, Halloween masks, Santa hats, Bunny Ears, and Scythe.
Newer holiday items are still being released in the main version of RuneScape, but it is common to have to complete a series of tasks in order to achieve the holiday item(s), starting with the yo-yo.