

Exhibit 99.1

Anchor Gaming
815 Pilot Road
Suite G
Las Vegas, NV  89119


May 7, 1999



Mr. Alan A. Rassaby
Powerhouse Technologies, Inc.
115 Perimeter Place, Suite 911
Atlanta, Georgia 30346

VIA FACSIMILE, ORIGINAL TO FOLLOW

Dear Alan:

This letter will set forth our agreement as follows:

o    You agree that  notwithstanding  any provision of the Agreement and Plan of
     Merger dated March 9, 1999 between you and the undersigned,  as amended, or
     any agreements  executed by Anchor Gaming in connection  with the Agreement
     and Plan of Merger (including,  without limitation,  any confidentiality or
     similar  agreement),  Anchor Gaming and its affiliates will be permitted to
     acquire  less  than  5% of  the  outstanding  common  stock  of  Powerhouse
     Technologies, Inc. prior to the closing of the Merger Agreement.

o    Anchor  Gaming  understands  that it will be subject  to state and  federal
     securities  laws  regarding  purchases  and  sales of  securities  while in
     possession  of material  non-public  information  with  respect to any such
     acquisition. It will inform its affiliates of such obligations as well.

o    Anchor Gaming  agrees,  and agrees to cause each affiliate of Anchor Gaming
     that  acquires any such common stock  pursuant to this letter  agreement to
     vote any such shares  consistent  with the  recommendation  of the Board of
     Directors of  Powerhouse  from time to time,  and to dispose of or hold any
     such  shares in  connection  with any  Third  Party  Acquisition  involving
     Powerhouse consistent with the recommendations of the Board of Directors of
     Powerhouse,  and if Anchor  Gaming  beneficially  owns any shares of common
     stock of Powerhouse  Technologies,  Inc.  acquired  under the terms of this
     letter  agreement  at the time that any  transaction  involving  a Superior
     Proposal (as defined in the Agreement  and Plan of Merger) is  consummated,
     then Anchor  Gaming agrees to dispose of such shares at the closing of such
     transaction  as  recommended  by  the  Board  of  Directors  of  Powerhouse
     Technologies, Inc.

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Powerhouse Technologies, Inc.
May 7, 1999
Page 2


o    Anchor Gaming agrees,  and agrees to cause each affiliate of Anchor Gaming,
     to refrain  from  purchasing  any such common  stock until two (2) business
     days  following  the filing by Powerhouse  Technologies,  Inc. of a Current
     Report on Form 8-K announcing the subject matter of this letter.

Please  sign and  return the  additional  copy of this  letter if it  accurately
reflects our agreement.

/s/ Geoffrey A. Sage

Geoffrey A. Sage, CPA
Chief Financial Officer



AGREED AND ACCEPTED

POWERHOUSE TECHNOLOGIES, INC.


By:   /s/ Alan A. Rassaby
   
Its:  Sr. VP Legal and Administration
  
Date: May 13, 1999

cc:  Hughes & Luce L.L.P.
     Rogers & Hardin L.L.P.

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