Three sortie modes
Story Sortie clears the invasion corridor, Daily Defense offers a fresh daily seed, and Endless Patrol survives escalating waves.
Games
Portrait orbit arcade shooter — Story, Daily and Endless sorties. Scores stay on your device.

Swipe through the app. Tap a screen to explore.
Earth Republic: Strike Back is a portrait arcade space shooter rebuilt for modern iPhone and iPad. Pilot the A-11 interceptor, clear invasion lanes, and break Orbital Harvester bosses. Play Story Sortie, Daily Defense, or Endless Patrol with one-finger drag flight and auto twin cannons. Scores and progress stay on your device — no account required. Ads may appear after several completed sorties; a one-time Remove Ads purchase permanently removes banner, interstitial, and rewarded ads.
Story Sortie clears the invasion corridor, Daily Defense offers a fresh daily seed, and Endless Patrol survives escalating waves.
Drag to fly with auto twin cannons, track hull and score, collect power-ups, and finish each sortie with clear victory or defeat flow.
Best scores, sortie progress, and settings stay on your device. No account, leaderboards, or online player profile.
Ads may appear after several completed sorties. A one-time Remove Ads purchase permanently removes banner, interstitial, and rewarded ads.
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Publisher: MR IU PING CHUNG
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The team behind this app
The same team helps Hong Kong organisations connect mobile experiences to existing systems and plan practical post-launch support.