ou are Serv-Bot, the last line between Greeb and the data towers.

Threats rain down on the six towers you guard. Aim, fire, and detonate bursts that wipe out whole clusters at once; chain kills for combo bonuses, but watch your ammo, because every launcher has limited charges and a reload means a gap in the wall. Clear a cycle with every tower standing and the game pays you for it.

Every cycle escalates. Named waves like Ping Flood, Fork Storm and Crash Cascade bring new threats: fork bombs that split when you miss, bug pods that burst into swarms, spears that dive, USB bombers that carpet the towers. Then Greeb opens his arsenal: encrypted payloads, adware blimps, zip bombs, sidewinders, ransom vaults and mirror daemons, any of which can shed more threats when hit.

Level up mid-run. Kills earn XP; every level offers a draft of upgrades across common, rare, epic and legendary tiers: wider bursts, faster reloads, hardened towers, twin cores, chain purges, and ultimates that freeze the field, repair the towers, overclock your guns, or purge the sky. Own everything and the final power appears: Menace Master, which cranks the threat up 100% per rank for players who want the game to fight back harder.

Every tenth cycle, Greeb himself. Shoot his ship down, or beat him in the hack: a rhythm duel of arrow inputs where a perfect run reverses his intrusion, and a failed one hands him a launcher. Fail three times and he breaches the firewall. There is no ending where you win. There is only how long you held.

Features

• Endless score-attack defense with escalating named cycles

• Four difficulties, each with its own leaderboard

• 42 achievements, including lifetime Greeb-kill tracks per difficulty

• Draft-based upgrade system with four rarity tiers and four ultimates

• Boss fights with a rhythm-hack duel and counter-hacks

• Power-ups, ammo balloons and a threat roster of twenty-plus enemies

• Cutscenes from SIGNAL, the story series the game grows out of

• Keyboard and mouse or gamepad; interface text in 28 languages

The story continues. Serv-Bot's Firewall is one night in the world of SIGNAL, Lerk Interactive's short-form series about the Grid, Gretta, and the kid with the green mohawk who came to tear its wall down. The game is his run at the firewall, from the other side.