letting Bentley defeat specific enemies. The hat (500 points) makes Bentley briefly invulnerable. The hat also allows him to eliminate Berthilda the witch (3,000), who appears in the last maze of each level. Picking up the honey pot (1,000) can delay the landing of a swarm of bees. Other villains include Nasty Trees which become more aggressive as levels progress, a ghost that will usually appear in the Hidden Spiral levels, dancing skeletons, Gem Eaters whom Bentley Bear can defeat if he catches them while eating a gem, and Crystal Balls that appear in later levels and tend to follow Bentley Bear as he collects gems. The Nasty Trees and Crystal Balls can also pick up gems. The player can skip some castles and acquire additional lives and points by using secret warps activated by making Bentley Bear jump at special locations. Crystal Castles contains two easter eggs. Jumping 100 times or more in the southeast corner of level 1‒1 and clearing the maze of all gems will make ATARI appear on level 1‒2. On level 5‒4, if the player kills Berthilda and goes to the corner of the area where she was and jumps, "FXL" appears in the southeast corner of the screen. These are the initials of programmer Franz X. Lanzinger. Development Crystal Castles was the first game with the Leta chip, a custom trackball controller chip designed by Scott Fuller. Bentley Bear was named Braveheart Bear in the released prototypes, but Atari decided to change the name when advocates for Native Americans complained. Ports Crystal Castles was ported to the Apple II, Atari 2600, Atari 8-bit family, Atari ST, Commodore 64, BBC Micro, Acorn Electron, ZX Spectrum, and Amstrad CPC. The Atari 8-bit version was nearly finished in 1984, but was not released until 1988 as a cartridge in the styling of Atari XEGS games. There are two versions for the C64: a prototype by Atarisoft that wasn't released at the time but purchased by U.S. Gold and released in Europe in 1986; and one by Thundervision in the US in 1985. Reception Atari manufactured 5,380 Crystal Castles arcade cabinets. In Japan, Game Machine listed Crystal Castles on their December 15, 1983 issue as being the fifth most-successful upright arcade unit of the month. The programmer Franz Lanzinger estimates that the game may have grossed over in its lifetime. Computer and Video Games reviewed the Atari VCS