The only games that require you to pay extra are claw games. There are also some photo booths, but that is really it. And you'd use regular cash for these, I'm pretty sure.
DisneyQuest once ran on game cards (I searched DisneyQuest and found this out). They were much like the ones at Dave and Busters but when they changed the plan to one admission price and unlimited play, the area for card sliding started to disappear. It was basically just having a card filled with money(or credits paid for by money) and whenever you slid it at a game, some of the credit on the card would go towards the game. Then when you ran out you could reload it again later by adding more money. I personally don't like game cards (or at least the ones at a local aracde/party place) because they expire and you lose all the credit, and wouldn't be able to use it again later.
But DQ no longer uses game cards.
Here's an article about it from Wikipedia:
When DisneyQuest was first opened it had a lower admission fee but each attraction and game required a player to swipe a card to pay "credits" for it, and the card could be "recharged" by putting it and some money into a recharging station, similar to Dave & Buster's gaming restaurants. Within a few years this was changed to a single flat fee for entry, and the cards and readers were no longer used. The card readers continued to be used for a few years as means to insert credits (the card readers were set to free mode, and pressing the green "OK" button would insert a credit), but as new games moved in and old ones were retired, the card readers began to vanish as the machines were simply set to free play within the games themselves and, while a few can still be found, they are incredibly scarce today, and have all been disabled completely.
