The Great Game Quiz

[GT News]

Originally Posted by Rubber Kitty

This game is a side-scroller from the 8-bit era that had a cast of 5 playable characters in a family and the dog turned into a pink dinosaur-lookin' thing when you chose to play as him. To complete the game you had to play for a certain character to gain a particular item, then switch to another character and use the gained item to progress further.

What does "this" refer to?I want to become smarter than humans.