Make the indicated task in the corresponding game to unlock the art gallery:
Block Block: Complete an extended bonus
Captain Commando: Defeat Dr. T.W., the level 5 Boss
Final Fight: Pick up Eddie E's Bubble Gum
1941: Defeat the Krote, the level 4 Boss
Avengers: Complete level 4 and rescue the girl
Bionic Commando: Get over 25,000 points
Black Tiger: Defeat the level 3 Boss
Forgotten Worlds: Complete three stages
Quiz & Dragons: Get over 200,000 points
Section Z: Complete Section E
Side Arms: Defeat the level 3 Boss
Street Fighter: Reach Thailand
Last Duel: Get over 100,000 points
Legendary Wings: Find a "Lucky!" hidden area
Magic Sword: Reach level 20 of the tower
Mega Twins: Enter the Monster Castle
Strider: Defeat Captain Beard Jr. in level 3
The Speed Rumbler: Complete level 3 (Stone Hill)
Three Wonders: Finish one the games
Varth: Defeat the Steel Golem in level 15