Buy Bugs. Billions of Bugs. PC key

Bugs. Billions of Bugs. is a tower defense game in which you protect a mining colony from swarms of bugs using towers, orbital strikes and other abilities. Build defenses during calm periods, then reinforce chokepoints, replace destroyed positions and adapt as waves cross the battlefield. You can play solo or in 2–4 player Steam co-op.

Defend the colony

The enemy includes workers that flood the battlefield, armored grunts that smash through kill zones, darts that skitter past defenses and spitters that attack from range. Skyrays bypass ground defenses, colossi are hard to kill, and queens and kings pose further threats. The Bug Index tracks seven species, their armor and behavior, and the towers best suited to counter them.

You can build eight types of towers: Gatling turrets, acid sprayers, plasma cannons, cryo towers, sniper emplacements, mortars, Tesla towers and flame turrets. Seven active abilities let you call in orbital strikes, napalm, cryo-EMP, acid rain, ion storms, gravity wells and bait drops.

Campaign and deployments

The campaign spans 26 handcrafted battlefields, each with its own paths, chokepoints and tactical problems. Seal each outpost to unlock the next deployment as the bugs grow more dangerous and your arsenal expands.

SURGE generates a new battlefield for every run, with randomized layouts, changing nest positions and unpredictable terrain. You can also play custom maps and subscribed Steam Workshop creations, alone or in co-op.

Create battlefields

The built-in map editor lets you place walls and nests, carve paths, test routes and create custom challenges. Save maps locally, publish them to Steam Workshop or subscribe to maps made by other players.

Persistent upgrades

Deployments earn ore and gems that advance a persistent tree of 165 upgrades for towers, orbital powers and prestige bonuses. Unlock weapons, specialize towers through multiple upgrade paths, improve your starting economy and strengthen your defenses. Gem-powered prestige progression also provides bonuses across deployments.

Co-op and music

In 2–4 player Steam co-op, you can host a friends-only or public lobby, invite through Steam or join Quick Match. The game includes a 986-track soundtrack spanning roughly 60 hours, with options to skip tracks and adjust the volume.