Simplify the following text for a Grade 7 native English-speaking person.
Original: The MESS emulator supports recording and playing back of Atari 2600 emulation sessions . The Home Action Replay Page ( aka HARP ) allows Atari 2600 users to archive their favorite play sessions of the Atari 2600 system and its games .
Simplified: In 1986 , a cheaper version of the Atari 2600 , called the Atari 2600 Junior , was released .