This page will host any oddities that I find in ZX Spectrum games whilst browsing their content with tools such as ZX Preview which is part of the ZX Modules. Pity that the host website no longer exists though …
Boxing Coach by Alfo Software (1989)
I think this cheat routine is very subtle. Unless you were in the know (or had hacked the game), it wasn’t going to jump out and shout it from the rooftops.
8 INPUT PLEASE ENTER NAME";N$
9 IF LEN N$>10 THEN GOTO 8
10 IF N$="ABCDEFZY" THEN MONEY=MONEY+99999999
The daft thing is that I was actually looking for “The Boxer” by Cult Software and looked inside this game’s .TAP file by accident!