Friday August 1, 2014 at 11:54pm PDT (check back - new cheats added daily)
1941: Get over 500,000 points. Avengers: Get over 20,000 points. Bionic Commando: Complete level 1. Black Tiger: Get over 25,000 points. Block Block: Complete the beginner course. Captain Commando: Get over 30,000 points. Final Fight: Play as all three characters. Forgotten Worlds: Get over 15,000 points. Last Duel: Get over 50,000 points. Legendary Wings: Get over 30,000 points. Magic Sword: Get over 120,000 points. Mega Twins: Get over 15,000 points. Quiz & Dragons: Enter the Flatfield from level 2. Section Z: Get over 70,000 points. Side Arms: Get over 200,000 points. Street Fighter: Get over 60,000 points. Strider: Get the Terapodal Robopanther. The Speed Rumbler: Get over 20,000 points. Three Wonders: Play all three games. Varth: Get over 250,000 points.
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. 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. Forgotten Worlds: Complete three stages. 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. Quiz & Dragons: Get over 200,000 points. Section Z: Complete Section E. Side Arms: Defeat the level 3 Boss. Street Fighter: Reach Thailand. Strider: Defeat Captain Beard Jr. in level 3. The Speed Rumbler: Successfully complete level 3 (Stone Hill). Three Wonders: Finish one the games. Varth: Defeat the Steel Golem in level 15.