Comparison

Disturbed Protocol Zero vs Frontline Horizon

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Disturbed Protocol Zero

Features
Read full description

The world has collapsed after the activation of the mysterious Protocol Zero. Cities are overrun with infected, resources are scarce, and escape is your only hope. In Disturbed Protocol Zero, you must explore dangerous zombie-infested environments, find supplies, solve puzzles, and repair various escape vehicles like buses, helicopters, and boats to survive. Explore abandoned hospitals, police stations, ports, and laboratories. Face hordes of infected and terrifying creatures. Search for parts, fuel, and tools to repair vehicles. Solve puzzles and unlock new areas. Manage limited ammunition, first-aid kits, and resources. Enjoy a pixel art survival horror experience. Each scenario offers new challenges, enemies, and ways to escape. Can you survive the chaos and uncover the truth behind Protocol Zero?

About

Frontline Horizon

Features
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ENTER THE BATTLEFIELD Step into Frontline Horizon: FPS Ops and take on intense military missions across large environments filled with changing conditions, challenging enemies and tactical objectives. CHOOSE YOUR OPERATIVE Select from 4 military-themed characters and choose the operative that matches your play style. Prepare for every mission and take control of the battlefield. BUILD YOUR WEAPON LOADOUT Choose your equipment from a growing arsenal of pistols, SMGs, assault rifles, shotguns and sniper rifles. Select the right weapon for each combat situation. PLAY YOUR WAY Experience multiple mission-based gameplay modes with different objectives, environments and challenges. Complete 20 levels across two mission modes, then jump into Free Mode for extended combat. EXPLORE LARGE BATTLEFIELDS Move through varied environments designed to keep every mission feeling different. From open areas to challenging combat locations, every level brings a new objective. FIGHT THROUGH CHANGING CONDITIONS Battle across six different conditions, including sunny, rainy, sunset, evening, foggy and snowy environments. Changing conditions create a different atmosphere and challenge across missions. EXPERIENCE FPS & THIRD-PERSON ACTION Switch between first-person and third-person gameplay and experience the action from different perspectives. DISCOVER MILITARY VEHICLES Explore battlefields featuring military-themed vehicles, including tanks, helicopters and aircraft. KEY FEATURES • First-person and third-person gameplay • 4 selectable military characters • 8+ weapons • Pistols, SMGs, assault rifles, shotguns and sniper rifles • 20 mission levels • Two mission-based gameplay modes • Free Mode for extended gameplay • Large environments • 6 changing weather conditions • Tanks, helicopters and aircraft • Easy-to-learn controls • Mission-based progression Choose your operative. Build your loadout. Enter the battlefield. Frontline Horizon: FPS Ops is ready for your next mission.

Screenshots

Disturbed Protocol Zero4 screens
Frontline Horizon4 screens

Verdict

The call

The clearest difference is ads: Frontline Horizon at none against Disturbed Protocol Zero's shown. Frontline Horizon also leads on update cadence (every 5 days vs every 2 weeks). Disturbed Protocol Zero's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Disturbed Protocol Zero ships an update every 2 weeks, Frontline Horizon every 5 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

Scorecard3 real differences Ā· 3 level
Disturbed Protocol Zero versus Frontline Horizon: the parameters behind the verdict, then further details
ParameterDisturbed Protocol ZeroFrontline Horizon
PriceFreeFree
Update frequencyEvery 2 weeksEvery 5 days — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size185 MB509 MB
Age rating12+17+
DeveloperAlejandro DominguezAsad Manzoor

In-app purchases

None

Disturbed Protocol Zero

No in-app purchases

None

Frontline Horizon

No in-app purchases

Questions

Is Disturbed Protocol Zero free?
Disturbed Protocol Zero is free to download, with no in-app purchases.
Is Frontline Horizon free?
Frontline Horizon is free to download, with no in-app purchases.
Do Disturbed Protocol Zero or Frontline Horizon have ads?
Disturbed Protocol Zero shows ads; Frontline Horizon does not.
Which is updated more often, Disturbed Protocol Zero or Frontline Horizon?
Disturbed Protocol Zero ships an update every 2 weeks, and Frontline Horizon every 5 days. Most recently, Disturbed Protocol Zero was updated on October 3, 2026 and Frontline Horizon on October 7, 2026.

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