Infectonator: World Dominator

Infectonator: World Dominator, also known as World Infectonator in China, is a classic pixel strategy Flash browser game developed by Toge Productions and published by Armor Games, released in 2010 as the sequel to the original Infectonator. Players take the role of a mad scientist, tasked with releasing zombie virus to conquer cities all over the globe, triggering chain infections and turning all humans into zombies. Earn coins by infecting people, use the lab menu to upgrade virus transmission speed and zombie stats, and unlock items like bombs and special mutated zombies. The game features maps of cities worldwide, packed with funny easter eggs and cameo characters. It retains the series dark humor and pixel art style, fully operated by mouse click, and was one of the most popular zombie strategy Flash games of its era.

These games get the keyboard directly — the controls are whatever the game itself defines, usually in its own help or options screen. Some games show on-screen buttons on phones.