Using Moodle 2.7.2+ (Build: 20141002) and HotPot 2014070225. If Activity completion is enabled for site and course, the HotPot Activity completion parameters feature 2 possible conditions:
Require view: Student must view this activity to complete it
Require grade: Student must receive a grade to complete this activity
Unfortunately, the Require view condition does not work. Actually, I am of opinion that this condition is useless (and misleading) on an activity which requires questions to be answered/graded (as the HotPot activity).
I suggest you remove the display of this useless condition from the HotPot settings. In file mod/hotpot/lib.php, line 58, change 'FEATURE_COMPLETION_TRACKS_VIEWS' => true, to false.