1992-1994
The first H.E logo, which debuted in "Putt-Putt Joins the Parade" , was simplally a capital H and a lowercase E that also formed an exlamation point.
1994-1996
1996-2007
2007-2014
2014-present
with the relaunch of H.E after Atari sold it to Tommo, Inc. the logo looks like it did in the late 90s, but the colors are blue and yellow, not purple.