The Jewels Of Babylon (credits, magazine scores and covertape).

The jewels were made in Babylon some 3,000 years ago and reached English hands by the end of the 19th century. Queen Victoria meant to give them to an Indian princess as a wedding present, but pirates took the ship carrying them off West Africa and left the crew for dead, all except you. See the reviews.

Computer & Video Games complained that your ship is bright pink, "and no amount of fiddling with the TV will make it go the colour you thought 19th century ships were supposed to have been". See the reviews.

Every reviewer struggled with the first move. "Down", "Go down" and "Climb ladder" all fail; you need "CLIMB DOWN LADDER" and then "CLIMB INTO BOAT". See the reviews.

Crash's lukewarm review called the game "the same cake with a different flavoured icing". In its later After Shock review Crash recalled that the Jewels review had "caused a stir in the Interceptor camp". Sources: Jewels reviews, After Shock reviews.

Scores: Big K 2/3, Computer & Video Games 6/10, Crash issue 13 6/10, Personal Computer Games 6/10, Personal Computer News 8/10, Sinclair User issue 37 4/10. It was later given away on Sinclair User issue 88's Megatape 17 (July 1989). Source: Spectrum Computing.

The giant crab can follow you from room to room. Bit 0 of Flag_CrabFollowing is set at EF91 when you walk into room 30 while the crab is there, and cleared at EF64 when you reach room 2C, or at FB43 when the boulder falls on it. The other seven bits are spare, so the engine could have had up to eight followers.

The water snake at Event_WaterSnake leaves you alone most of the time. Only if a one-in-four roll goes against you does it strike, and even then a second roll at EF0F, nominally one in 14, decides whether the bite kills you. Both rolls come from the frame counter about 19 frames apart, so in practice a strike kills you about three times in sixteen. Computer & Video Games said these encounters are "just for fun" most of the time. See the reviews.

The dead-pirate table at F904 has entries for the water snake and the spider at F907, which are never used because the search at F8C8 only ever finds pirates. Item 36 in FDEB has no description and is never put into play, and the scenic-event tables have spare slots at UnusedScenicEventLocations and UnusedScenicEventRoomPointers.

Entries E81B and E820 in the vocabulary are token 100 (64), stored as "FUCK" and "SCRE" (the game only keeps the first four letters of each word, so this is FUCK and SCREW). Swear at something and Action_Swearing tells you off, and it remembers that you did. The first time you get "Don't be disgusting!" (Messaging_DontBeDisgusting), the second time "I've warned you before! This deviant practice has got to stop." (Messaging_WarnedYouBefore), and after that the game just says "I didn't hear that!" (Messaging_IDidntHearThat) until you start a new game. Two bits at GameFlags_Help keep track of how many times you have sworn.