Tetris (Tengen, NES)

Tengen's Tetris was pulled from shelves after a mere month due to complicated licensing disputes with Nintendo. It had a few features Nintendo's later version (released six months later) did not have, and some consider it the better Tetris game of the two.

Level Select
Pause the game and press Up, Down, Up, Down, Left, Right, B, B to activate a level select. Pressing A increases your level, allowing you to go beyond the usual 9 levels, up to Level 17.

Hi-Score Clear
At the title screen, press Up + Down + A + B + Select at the same time, you can combine the different buttons on both controllers, just press at least one of that buttons on any controller. This will erase the Hi-Score tables.

1 Player Cooperative Mode
The Game Genie code re-enables the fourth game mode - 1 Player cooperative with CPU controlled second player. The cursor screen coordinates for the fourth option at the title menu are incorrect, but selection is working anyway.

Hi-Score View
Additionally, at the title screen, press B, A, B, A, Select, Select on any controller. This will display a system hi-score table list.

Handicap Mode Select
Use the Game Genie codes (obviously, on emulator only), to replace the level select mode with an unused handicap select mode, which is present otherwise in the Console version rather simplified. This particular screen have little misplaced cursor position, but options works fine, also you can notice that there is different copyright text is present.