Retro mode filters

Retro filters are visual changes that can be applied to the game after unlocking them via a potion. Upon consuming the potion that filter becomes available in the options menu. The filters are, as the name implies, based upon older graphics styles, with 12 different unlockable filters. (to be added with pictures of the filters in action IN SPOILERS and death cards)
 * GB
 * EGA
 * C64
 * Apple II
 * Commodore VIC-20
 * CGA Mode 4-1 Hi
 * CGA Mode 4-1 Lo
 * CGA Mode 4-2 Hi
 * CGA Mode 4-2 Lo
 * CGA Mode 5 Hi
 * CGA Mode 5 Lo
 * Pen & Paper