Intrusion

Intrusion was one of those straightforward action games you'd find during the Flash era. It came out in 2005, a time when browser-based games offered quick, focused experiences without much fuss. You controlled a soldier, and the goal was simple: get to the end of each level.

You move with the WASD keys and aim your gun with the mouse, firing at anything that moves. The levels scroll from left to right, filled with enemy soldiers and occasional turrets. You can switch between a few different weapons, like a rifle and a rocket launcher, to deal with tougher threats. The game moves at a steady pace, but it gets difficult quickly as enemy fire becomes more dense and accurate. It feels like a tense, methodical push through hostile territory where every corner could hide a new threat.