RED DEAD RESURRECTION

There are more than a dozen varieties of enemy. The Tracer and diagonally moving Slicer produce smaller versions of themselves; the hardy Creeper moves in steps; the Lancer speeds up when damaged. When destroyed, some produce Spectres with a bright red hue; there are fewer of these and they move relatively slowly, but they’re also invulnerable. Then there’s the Vindicator, which must be attacked from the rear, since its front-mounted missile launcher is shielded.