This app isn't in any of our charts yet.
- Improved ad consent handling. Where required, you can reopen ad privacy choices from Settings. - Failed ad loads now retry with growing delays to save battery and data.
Frozen front line. Wake the firepower with gunfire. 3-lane defense shooter.
Line Zero, humanity's last fortress. A cold-lockdown protocol triggered on the day of the first war flash-froze both the pathogen and the forces that fought it. Now the same pathogen's second generation — codenamed Coldforge — is pushing back through the ice. You're a Breaker: the last gunner left to hold the line. Every time the barrel runs hot, the firepower sleeping under the ice wakes up. ■ Three lanes, one trigger finger - Drag to move left and right while your gun keeps firing straight ahead — no aiming, just deciding where to stand. - Shoot the ice blocks trapping weapons, vehicles, and troops to claim them. Start with a single pistol and climb through SMG, machine gun, gatling, all the way to tank-tier firepower as the screen fills with allies and muzzle flash. The late tiers do not fire bigger — they fire FASTER. - Five infected types, each with a different answer. Troopers stagger and lunge; Sprinters flank fast and fragile; Bloated Carriers burst into frost on death; Frozen Bulwarks carry a slab of the barricade they died holding — it eats most of your bullets, so break the slab first or hit around it with a blast; and Spitters never reach you at all, halting at range to lob acid into whichever lane you are standing in. Ignore one and you bleed while you are winning; go and deal with it and you have spent the time you needed for the crowd. - A massive infected crosses the line every 4 waves. Five bosses — Titanbone, an ice-armored brute that charges; Gunner, a commander with a fused-arm weapon burst-firing; the Frost Tank Host, fused with tank wreckage; Breacher, a demolitionist lobbing charges into random lanes; and Coldheart, patient zero, freezing the whole battlefield — each one demands a completely different answer. A boss that reaches your line does not move on: it stands there hitting you until it goes down. - Five sectors inside the fortress — Trench Line, Frozen Checkpoint, Motor Pool, Inner Keep, and the Reactor Core — each with its own landmarks, lighting and alarm colour. ■ Operation Orders Three standing objectives, always. Shatter five bulwark shields, reach wave 5 without losing a single ally, kill 30 with gatling or tank firepower — finish one and it pays Salvage on the spot and is replaced immediately. Salvage buys six permanent upgrades: damage, fire rate, line durability, squad size, salvage speed, and armour-piercing rounds that punch further through ice shields. ■ Gear worth scavenging Eight skins, five hats and four pairs of boots, all shown as real 3D previews before you equip them. Unlock them through different paths — wave records, salvaged resources, specific boss kills — and watch them go from frost-and-rust straight off the field to fully restored as you progress. ■ Line Zero keeps records 15 scattered field logs, two-stage lore for each of the 5 bosses (10 boss files), and 12 radio chatter lines in the background slowly piece together what actually happened at this fortress. 20 achievements and 3 difficulty tiers (each with its own line of in-world flavor text) give repeat runs something new to chase. ■ Sound and performance An adaptive score plays underneath the whole run: a drone and wind in the lobby, a driving ostinato once the shooting starts, and a different arrangement entirely for boss waves. Graphics quality measures your device's real frame times and steps itself down, or you can pin a tier in settings. ■ An honest promise No forced ads. If you want to continue after dying, you choose whether to watch a short rewarded ad — that's the only ad in the game. No in-app purchases, no account required, and it works fully offline. Supports English and Korean. ■ Who it's for - Players who want tight shooting paired with a visible power curve - Anyone looking for a defense game with a serious, cold tone instead of a cartoon one - Players who want short sessions with zero forced ads
past month, based on 1 day
Downloads
Low confidence1
From install count ÷ months since release
In-app revenue
$0
No in-app purchases
Ads
$0
$0 – $1
Estimate, ads (benchmark-based, not calibrated per app)
Total
$0
In-app + ads
Google Play only. Downloads from daily Top free ranks (or the store's install count); in-app revenue from Top grossing ranks, calibrated on AppTweak's US estimates, or else from downloads; ads from public ad benchmarks. Not reported figures.