checked-no =>Horizontal Mode: Both games offer a horizontal mode, with the playfield flipped on its side, vertically. This allows you to hold the GBA on its side and play using a taller screen. Each game's horizontal mode must be unlocked seperately. * Dr. Mario: Complete Virus Level 20 in single player mode. This might also be unlocked by completing level 6-5 in the standard Line Mode game. * Puzzle League: Score 10,000 points or more in Endless mode.