Game and Watch Gallery 4

Delete saved data
Press Up, Up, Down, Down, Left, Left, Right, Right in the title screen.
(Thanks to purple_plum13@hotmail.com)

More difficult star mode
Get 1,000 points in Modern Mode to unlock the more difficult Star Mode.
(Thanks to purple_plum13@hotmail.com)

Stars required to unlock further games
5 stars - Chef
10 stars - Manhole (View only)
15 stars - Tropical Fish (View only)
20 stars - Mario Bros.
25 stars - Mario's Bombs Away (View only)
30 stars - Parachute (View only)
35 stars - Donkey Kong
40 stars - Bombsweeper (View only)
45 stars - Climber (View only)
50 stars - Octopus
55 stars - Lifeboat (View only)
60 stars - Zelda (View only)
65 stars - Fire Attack
70 stars - G&W History
80 stars - Manhole
90 stars - Tropical Fish
100 stars - Mario's Bombs Away
110 stars - Parachute
120 stars - Bombsweeper
130 stars - Climber
140 stars – Safebuster (View only)
150 stars - Lifeboat
160 stars - Zelda
(Thanks to purple_plum13@hotmail.com)