Infection Inc. [Probes!]

Infection Inc. [Probes!] is a competitive tycoon game on Roblox by Undone Studios where players build a zombie infection corporation and race to destroy the human race before rival players do the same. Created in 2017 and last updated in August 2022, it accumulated 78.8 million visits and 619K+ favorites during its active development - reflecting strong historical popularity in the tycoon and simulation genre. Servers hold only 4 players, creating an intensely intimate competition format.

The Probes! update added an alien mechanic on top of the core zombie-building loop. Each player runs their own Infection Empire, building zombie spawner infrastructure and actively sabotaging rivals:

• 💼 Zombie spawners generate your core income stream
• 💼 Probes gather civilian brains as a resource and upgrade material
• ⚔️ Sabotage mechanic - actively undermine other corporations' zombie production
• ⚔️ Competitive race - whoever destroys humanity first wins the round
• 💎 21-gamepass catalog including zombie skins, vehicles, weapons, and spawner upgrades

The 4-player server cap means every action carries weight - one well-timed sabotage can flip the outcome of a round. The gamepass catalog adds considerable depth: zombie skin variants (King, Rich, Alien, Cyborg), combat vehicles (Big Buggy, Tank, Jetpack), and specialized weapons (Minigun, Masher, Exploding Zombie Spawner, Cyborg Zombie Spawner) give players substantial options to differentiate their strategy.

Infection Inc. is in a legacy/maintenance state as of 2026 with no new updates since August 2022, but remains playable and accessible for players who enjoy its zombie-tycoon-sabotage formula.