tipster

• From tip (etymology 5) +‎ -ster.

tipster (plural tipsters)

1. A person who provides tips or advice to others, for example on the form of racehorses or the stock market. [from later 19th c.]
2. (video games, informal) One who provides tips or hints on how to succeed at a game.
   • 1987 June, CRASH, number 41:

     Absent from the pages of CRASH for a year, ex-tipster Robin Candy returns and puts finger to key to debate the state of the games software industry.

   • 1994, “Amiga Power”, in magazine, number 42:

     Those are the two choice words top tipster Rich Pelley used to describe the monthly helpathon that is the one and only COMPLETE CONTROL.

   • 1995, Stephen Smith, “Zub - Hidden Game?”, in comp.sys.sinclair (Usenet):

     Does anybody know what Jon Riglar is doing now? (SU Tipster for about 6 years - Zapchat!).

• Pitters, pitters, spitter