Harrier Strike Force is a jet simulation without plot. The game features
one island with a gas fuel station, an airport and a tank headquarter with the
simple goal to destroy everything. Of course there is resistance: there are
five jets and ten tanks on the island. Those only get active after the
previous is destroyed and rise in difficulty – destroying the associated
building takes care about all at once. The player has access to three weapons:
an unlimited 30mm cannon, three heat-seeking rockets (effective against jets)
and 16 heat bombs for defense against enemy rockets. After everything is
destroyed, the jet has to safely return to base.

All this has to be completed before the jet fuel runs out, effectively giving
the player only a few minutes to complete the goals. The main motivational
factor is optimizing the high score because the effective measures (e.g. using
the rockets or destroying the airport first) give much less points than the
hard way. The player has various options for setting the game variables, e.g.
difficulty or enemy behavior, but this prevents access to the high score list.