Tracer

A good runner/schmup game, where you control an armed man running across the earth's surface. You are armed with two types of radiation weapons (both, of course, with infinite ammunition; shooting is done with the "Alt" key): with a large stream as a starting weapon, and smaller, scattering weapon later on. Both of them are present at the levels in the form of bonuses - "cylinders" of green and red colors, respectively; while each means of killing enemies after selection instantly "replaces" the previous one (if the latter was different from it) without the possibility of switching between them. Each of the weapons has several "modifications".