Hell Raiser

The alien race Hellraisers seized the planet Hazbal which is an important
junction of space trade routes. The player’s job is to drive them out of the
system. The game consists of six levels with two alternating gameplay
mechanics. In the first, third and fifth level the player controls the
mercenary himself who walks and jumps through the side-scrolling levels. With
his weapon he shoots everything that moves and uses teleporters and holes to
find his way. The other levels are horizontally shooters in a top-down
perspective. The player controls a space ship, moves through the levels and
shoots everything that moves. Killed enemies may leave symbols behind which
give advantages when picked up.