Lead an automated military fortress against relentless zombie invasions by placing defensive structures and purchasing incremental upgrades to boost firepower and survivability. The game progresses whether you're playing or offline, rewarding strategic placement and long-term progression systems typical of idle games with tower-defense mechanics. Suited for players who enjoy the satisfying grind of resource accumulation paired with tactical base-building elements.
About this game
Command automated military defenses, upgrade your fortress, and survive massive zombie waves in this action-packed idle defense game. Build powerful defenses, unlock upgrades, and hold the line against endless undead hordes.
Players, last 61 days
Peak 15 · Low 0
Daily peak concurrent players, sampled once a night from Steam.
What players are saying
▲ Recommended0 hrs
Its super addicting. Played it for a while. loved the helicopter and the nuclear bomber. they basically made the laser beam useless
The game is fine. Pretty typical incremental game that doesn't do anything particularly special. As of release day not all levels are available and the monster truck doesn't work. The UI is kind of clumsy to use and the tree path layouts are weird. There's a lot more games available at this price point that are far better though.
🎃 The Halloween Update is almost here!Get ready for a spooky new look in Operation: Outbreak Idle! 🧟The Halloween update goes live on October 26. Prepare your defenses, survive the outbreak, and get ready for some Halloween chaos!See you on the battlefield, Survivors! ☣️
We just reached 1,000 copies sold on Steam!As a solo developer, this is a huge milestone for me. Thank you to everyone who bought, played, reviewed, shared, or supported Operation Outbreak Idle.Your support means a lot and keeps me motivated to continue building and improving the game.Thank you for being part of this journey! ❤️More to come. 🧟♂️💚
Here’s what has been added and improved:Bug FixesGame BalancingPerformance ImprovementsSteam Cloud SaveArena Camera Zoom In / OutController SupportThank you for all the feedback and support. More updates and new content are coming!
Posts come from Steam's official announcements feed.
