All game modes:
Hold Left + X + Triangle and press
Start at the title screen.

Atari 2600 challenges:
Complete the indicated task in the listed arcade games
and mode to unlock the corresponding challenge in the corresponding
Atari 2600 game.

Arcade game	Mode	Goal	Atari 2600 challenge
Asteroids	Trippy	10,000 points	Asteroids'
Asteroids	Hot Seat	20,000 points	Desert Falcon
Asteroids	Time Warp	10,000 points	Sprintmaster
Asteroids	Time Challenge	8,000 points	Super Baseball
Asteroids Deluxe	Double Speed	15,000 points	Adventure
Asteroids Deluxe	Trippy	15,000 points	Dodge 'em
Asteroids Deluxe	Time Challenge	11,000 points	Steeplechase
Asteroids Deluxe	Hot Seat	35,000 points	Super Football
Battlezone	Time Warp	5,000 points	Battlezone
Battlezone	Double Speed	5,000 points	Flag Capture
Battlezone	Trippy	10,000 points	RealSports Tennis'
Battlezone	Hot Seat	50,000 points	Street Racer
Black Widow	Time Warp	20,000 points	Human Cannonball
Black Widow	Trippy	30,000 points	Star Raiders'
Black Widow	Time Challenge	10,000 points	Swordquest: EarthWorld
Black Widow	Double Speed	25,000 points	Video Olympics'
Centipede	Time Warp	17,000 points	Backgammon
Centipede	Hot Seat	30,000 points	Centipede
Centipede	Time Challenge	18,000 points	Off-the-Wall
Centipede	Double Speed	20,000 points	Star Ship
Crystal Castles	Trippy	10,000 points	Crystal Castles'
Crystal Castles	Hot Seat	15,000 points	Outlaw
Crystal Castles	Time Warp	15,000 points	Stellar Trek
Crystal Castles	Time Challenge	13,000 points	Video Chess'
Gravitar	Time Challenge	6,000 points	Breakout
Gravitar	Double Speed	10,000 points	Gravitar
Gravitar	Hot Seat	10,000 points	Hangman
Gravitar	Trippy	15,000 points	Radar Lock
Liberator	Trippy	8,000 points	Atari Video Cube
Liberator	Double Speed	7,000 points	Skydiver
Liberator	Time Warp	5,000 points	Swordquest: FireWorld
Liberator	Hot Seat	8,000 points	Video Pinball
Lunar Lander	Double Speed	400 points	Fun with Numbers'
Lunar Lander	Time Challenge	100 points	Haunted House
Lunar Lander	Time Warp	200 points	Submarine Commander
Lunar Lander	Trippy	300 points	Swordquest: WaterWorld
Major Havoc	Hot Seat	60,000 points	Air-Sea Battle
Major Havoc	Time Challenge	24,000 points	Bowling
Major Havoc	Double Speed	35,000 points	Canyon Bomber
Major Havoc	Time Warp	30,000 points	Math Gran Prix
Millipede	Hot Seat	35,000 points	Double Dunk
Millipede	Time Challenge	15,000 points	Maze Craze
Millipede	Trippy	30,000 points	Millipede
Millipede	Time Warp	40,000 points	Video Checkers'
Missile Command	Trippy	10,000 points	Football
Missile Command	Double Speed	7,500 points	Missile Command
Missile Command	Time Challenge	2,500 points	Night Driver
Missile Command	Hot Seat	15,000 points	Surround
Pong	Trippy	Beat opponent by 6 points	3D Tic Tac Toe
Pong	Time Warp	Beat opponent by 1 point	Circus Atari
Pong	Double Speed	Beat opponent by 3 points	Golf
Pong	Hot Seat	50 points	Space War
Red Baron	Double Speed	2,500 points	Black Jack
Red Baron	Time Challenge	1,400 points	Combat
Red Baron	Time Warp	2,000 points	Home Run
Space Duel	Time Warp	10,000 points	Casino
Space Duel	Hot Seat	20,000 points	Demons to Diamonds'
Space Duel	Time Challenge	6,000 points	Miniature Golf
Super Breakout	Hot Seat	70 points	RealSports Volleyball
Super Breakout	Time Challenge	45 points	Slot Machine
Super Breakout	Trippy	60 points	Super Breakout
Tempest	Hot Seat	10,000 points	Quadrun
Tempest	Trippy	7,500 points	RealSports Football
Tempest	Double Speed	6,000 points	Yars' Revenge
Warlords	Double Speed	800 points	RealSports Baseball
Warlords	Trippy	1,000 points	Slot Racers'
Warlords	Time Warp	700 points	Warlords'

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Hint: Asteroids: Second dimension shooting:

You must be at the side top or bottom of the screen.
Then, shoot towards that part of the screen. Watch the opposite
screen to see your shots come through. Note: This works best when
a asteroid is on the opposite side, as you will have a chance
of exploding it.