Mars Lander was supplied as part of a compilation of 7 games by Rodent Software, simply entitled 'GAMES 1' and mentioned in QL User (Dec 1984/Jam 1985 issue), although it was stated that all of the games were very elementary and something you might find in a book titled like 'Fifty games for your ZX81'.
Details are unknown.
Title: Mars Lander
Language: SuperBASIC
Author: Unknown
Publisher: Rodent Software
Year of Publication: 1984
Platforms Suitable for: Unknown
Commercial Status: Commercial
Price as at December 1984: £8.50 (on cartridge of 7 programs)
Reviews: QL User (December 1984/January 1985)
Sources Available from: n/a
Latest Version available from: Unknown