I used to own a TRS-80 Model I. When these games were popular and text only, the catalogs (including Infocom) never (to my recollection) used the term IF. They used the term Adventure. The other biggies for the TRS-80 was from a company called Scott Adams Adventures. Not till after the advent of the 16-bit computer did I see the term IF being used after the term Adventure had been used first.
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