FUNCTIONALITY COMPATIBILITY No system modifications of any kind required. Plug Play! Works perfectly in any original Nintendo system, the original toaster NES or top loader, Retron HD, Retron systems 1, 2, 3, Retro Trio, Retro Bit, and all other good quality HARDWARE clone systems such as the Gamerz Tek systems. THIS CART WILL NOT WORK IN THE RETRON 5 AND RETRO FREAK SYSTEMS - these are Android emulator-based systems, not hardware-based. The game select menu is in alphabetical order and ALL games are fully in English. Will work with the Game Genie per all reports and testing. All codes *should* work, but cannot be guaranteed. NTSC (US) and PAL (EU) System Region Compatible. To switch regions, rapidly press the reset button 4 to 8 times very rapidly with the game in and the power on so that the system light is flashing. The system light will stay solid when set to the proper region. THE SAVE FUNCTION This cartridge includes a battery for save game files, but the only game that uses it here is Kirby. Other games, like Rockman or Contra, use their original level skip or progress methods like codes and passwords. FULL GAME LIST: 1. Rockman (JPN version of Mega Man) 2. Rockman 2: Dr. Wily no Nazo (JPN version of Mega Man II) 3. Rockman 3: Dr. Wily no Saigo! (JPN version of Mega Man III) 4. Rockman 4 Aratanaru Yab?!! (JPN version of Mega Man IV) 5. Rockman 5 Blues no Wana?! (JPN version of Mega Man V) 6. Rockman 6 Shij? Saidai no Tatakai!! (JPN version of Mega Man VI) 7. Rockboard (ENG translation) 8. Seirei Densetsu Lickle (JPN version of Little Samson) 9. Dragon Fighter 10. Saiyuuki World 11. Rush'n Attack (US version) 12. Jackal (US version) 13. Gradius (JPN version) 14. Life Force (US version, NTDEC copyright) 15. Parodius (EUR version) 16. Gun Smoke (EUR version) 17. Thunder Cade 18. Legendary Wings 19. Gekikame Ninja Den (JPN version of Teenage Mutant Ninja Turtles) 20. Teenage Mutant Ninja Turtles 2: The Arcade Game (US version) 21. Teenage Mutant Ninja Turtles 3: The Manhattan Project (US version)*** 22. Teenage Mutant Hero Turtles: Tournament Fighters (EUR version of Teenage Mutant Ninja Turtles: Tournament Fighters) 23. Contra (US version) 24. Super Contra (JPN version of Super C) 25. Contra Force 26. Final Mission (JPN version, removed copyrights) 27. Kage (JPN version of Shadow of the Ninja) 28. Super Mario Bros. (JPN/US version) 29. Super Mario Bros. 2 (EUR version) 30. Super Mario Bros. 3 (JPN version, removed copyrights, item select, infinite star power)*** 31. Dr. Mario (JPN/US version, removed copyrights, no moving viruses) 32. Mario Bros. (JPN/US version) 33. Nekketsu K?k? Dodgeball Bu (removed copyrights) 34. Nekketsu Kakutou Densetsu (removed copyrights) 35. Downtown Nekketsu Koushinkyoku 36. Nekketsu! Street Basket: Ganbare Dunk Heroes 37. Ike Ike! Nekketsu Hockey Bu 38. Downtown Special: Kunio-kun no Jidaigeki Dayo Zenin Shuugou! 39. Downtown Nekketsu Monogatari (JPN version of River City Ransom) 40. Bikkuri Nekketsu Shin Kiroku! - Harukanaru Kin Medal (removed copyrights) 41. Kunio Kun no Nekketsu Soccer League 42. Ninja Gaiden (US version) 43. Ninja Gaiden II: The Dark Sword of Chaos (US version) 44. Ninja Gaiden III: The Ancient Ship of Doom (US version) 45. Ninja Crusaders (US version) 46. Castlevania (EUR version) 47. Castlevania II: Simon's Quest (US version) 48. Double Dragon (JPN version) 49. Double Dragon II (JPN version) 50. Double Dragon III: The Sacred Stones (US version) 51. Takahashi Meijin no Bouken Jima (JPN version of Hudson's Adventure Island) 52. Hudson's Adventure Island II (US version) 53. Hudson's Adventure Island III (US version) 54. Takahashi Meijin no Bouken Jima IV 55. Kirby's Adventure (EUR version)*** 56. G.I. Joe: The Atlantis Factor 57. G.I. Joe: A Real American Hero 58. Robocop (US version) 59. Robocop 2 (JPN version) 60. Tokkyuu Shirei Solbrain (JPN version of Shatterhand)*** 61. Batman (US version) 62. Batman Returns (US version) 63. Pajama Hero Nemo (JPN version of Little Nemo: The Dream Master) 64. Chip to Dale no Daisakusen (JPN version of Chip'n Dale Rescue Rangers) 65. Chip to Dale no Daisakusen 2 (JPN version of Chip'n Dale Rescue Rangers 2) 66. Tiny Toon Adventures (US version) 67. Tiny Toon Adventures 2: Trouble in Wackyland (US version) 68. Kick Master (US version) 69. Astyanax (US version) 70. P.O.W: Prisoners of War (US version) 71. Cross Fire 72. Sword Master (US version) 73. Power Blade (US version) 74. Power Blade 2 (US version) 75. Flintstones: The Rescue of Dino and Hoppy (US version) 76. Flintstones: The Surprise at the Dinosaur Peak! (US version) 77. Mitsume ga Tooru 78. Adventures of Bayou Billy (US version) 79. Terminator 2: The Jugdement Day (US version) 80. Terminator (US version) 81. Blaster Master (EUR Prototype version) 82. Captain Tsubasa Vol. II: Super Striker 83. Silver Surfer 84. Guevara (JPN version of Guerilla War) 85. Summer Carnival '92 Recca 86. Darkwing Duck (US version) 87. Lion King (SuperGame, no Bug Toss)*** 88. TwinBee 89. Moero TwinBee: Cinnamon-hakase wo Sukue! (JPN version of Stinger) 90. Captain America and the Avengers (US version) 91. Monster in my Pocket (US version) 92. Kyatto Ninden Teyandee 93. Felix the Cat (US version)*** 94. SD Hero Soukessen: Taose! Aku no Gundan 95. New Ghostbusters II (JPN version)*** 96. Jurassic Park (US version) 97. Wacky Races (US version) 98. Darkman (US version, changed copyrights) 99. Silk Worm (US version, changed copyrights) 100. Saint Seiya Ougon Densetsu Kanketsu Hen (removed copyrights) 101. Bucky O'Hare (US version)*** 102. Panic Restaurant (US version) 103. Punisher 104. Super Spy Hunter (US version) 105. Gun Dec (JPN version of Vice Project Doom) 106. 1942 (JPN/US version) 107. 1943 (US version) 108. Kyuukyoku Tiger 109. Gun Nac (US version) 110. Choujinrou Senki Warwolf (JPN version of Werewolf: The Last Warrior) 111. Mighty Final Fight (US version) 112. Ningen Heiki: Dead Fox (JPN version of Code Name Viper) 113. JuJu Densetsu (JPN version of Toki) 114. Aladdin (HummerTeam, MMC3 hack, background animation missing)*** 115. Banana Prince (EUR version of Bananan Ouji no Daibouken) 116. Snow Bros. (US version) 117. Ultraman Club Kaijuu Dai Kessen!!! 118. Juuouki (JPN version of Altered Beast) 119. Tom Jerry: The Ultimate Game of Cat and Mouse (US version) 120. Goonies 121. Goonies II (US version) 122. Tank 1990 (Battle City hack, 1A-2N mode menu)*** 123. Popeye 124. Balloon Fight 125. Ice Climber (US version) 126. Wrecking Crew 127. Donkey Kong 128. Donkey Kong Jr. 129. Donkey Kong 3 130. Dig Dug 131. Dig Dug II (US version) 132. Excitebike 133. Choujikuu Yousai: Macross 134. Adventures of Dino Riki (US version) 135. Pooyan 136. Spartan X (JPN version of Kung Fu) 137. Spelunker (US version) 138. Galaga (JPN version) 139. Slalom 140. Tengen's Tetris (removed copyrights) 141. Chinese Chess (TXC Corporation) 142. Legend of Kage (US version) 143. Solomon no Kagi (JPN version of Solomon's Key) 144. Sky Destroyer 145. Yie Ar Kung Fu 146. Bomberman (US version) 147. Elevator Action (US version) 148. Hogan's Alley 149. Duck Hunt 150. Wild Gunman