The loop in I Must Fight Eight is refreshingly blunt: monsters pour in, you cut them down, and the level only opens once you take out the elite enemy guarding the portal. Clear it and advance, or linger a while longer if you are enjoying the carnage — the game is happy either way.

What keeps the arcade shooting from going stale is the shop that greets you before each level. Spend what you have earned on bullet upgrades and you walk into the next fight measurably stronger, which turns each run into a small argument between caution and firepower.

Movement lives on WASD while the arrow keys aim your shots, giving it that satisfying twin-stick rhythm on a keyboard — one hand keeping you alive, the other doing the damage. It is a free browser arcade game that gets to the point fast, and there are more arcade games when you want another quick fix.