MindTrick Software USA has recently released Sentry Alpha [App Store], a new 2D scrolling shooter for the iPhone and iPod touch.

As the developer describes it, Sentry Alpha is "a nonstop battle through seas, deserts, snow, and mountains against hordes of relentless aliens."  It's a vertical scrolling shooter featuring varying environment backdrops that's rather reminiscent of the classic arcade shooter Xevious.  The game features accelerometer control and two fire modes: a standard mode where a touch anywhere on the screen fires and an autofire mode where a touch to the screen casues the player's ship to fire harder, as it were.  Additionally missiles and bombs are deployed by jerking the iPhone in particular directions (which is a little awkward when the screen is crowded with alien enemies).

Features as listed by MindTrick:

  • Uses the iPhone and iPod Touch accelerometer for easy, 1-handed play
  • Large variety of small, large, slow, fast, and heavily armed enemies
  • Fast, smooth animation with antialiased graphics
  • Almost unlimited powerups allow you to dominate
  • 7 large, varied levels, 3 difficulty settings
  • Quality, professionally produced music tracks and sound effects
  • Suspend/Resume feature allows you to pick up from the last level completed
  • High scores list

Sentry Alpha feels somewhat slow-paced, which was concerning at first, until it became clear that the onscreen action ramps up notably as the game progresses.  It's something akin to the feel of the Amiga / Atari ST classic Xenon 2--slow-paced but hectic, if that makes sense.

Have a look at our brief gameplay video to get a better idea of what I'm talking about.

Although, admittedly I've not yet become a high score king in this game, I do find Sentry Alpha to be an enjoyable iPhone shooter.  Xevious fans, in particular, will find Sentry Alpha to their liking.

Game Details
Name: Sentry Alpha (v1.1) Price: $2.99 [Buy]
Developer: MindTrick Software USA
Size: 4.5 MB
Device: Tested on iPhone 3G
Sentry Alpha is a vertical scrolling shooter reminiscent of the arcade classic Xevious.  It's somewhat slow paced, but the onscreen action is not sparse.  It's an enjoyable iPhone shooter.

TouchArcade Rating

  • Carlos-Sz

    It looks nice but it seems uncomfortable to play.

    The only way to use the missile is shaking the iPhone?

    Anyway, nice review as always.

  • Carlos-Sz

    It looks nice but it seems uncomfortable to play.

    The only way to use the missile is shaking the iPhone?

    Anyway, nice review as always.

  • Kevin

    Hey Blake,

    Thanks so much for reviewing my game! Very fair but generous review, and I hope you continue to enjoy the game.

    Point taken on the shaking controls. I have received enough feedback on that to prompt me to add the onscreen buttons in a future update. Also, the resemblence to Xevious - that's a kick! Purely unintentional, but since Xevious was one of my favorites, I'm sure there was a subconscious influence.

  • Kevin

    Hey Blake,

    Thanks so much for reviewing my game! Very fair but generous review, and I hope you continue to enjoy the game.

    Point taken on the shaking controls. I have received enough feedback on that to prompt me to add the onscreen buttons in a future update. Also, the resemblence to Xevious - that's a kick! Purely unintentional, but since Xevious was one of my favorites, I'm sure there was a subconscious influence.

  • boardopboy

    Being a HUGE fan of Xevious, I have much interest in this one! Gonna have to wait for payday though (Rolando put me over my Wife Imposed App Store Spending limit for this month!).

  • boardopboy

    Being a HUGE fan of Xevious, I have much interest in this one! Gonna have to wait for payday though (Rolando put me over my Wife Imposed App Store Spending limit for this month!).

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  • Kevin

    Just FYI, v1.2 is out now (accelerometer fixes and tweaks), and v1.3 will be available some time next week, and that will have the on-screen controls that some users had requested.

  • Kevin

    Just FYI, v1.2 is out now (accelerometer fixes and tweaks), and v1.3 will be available some time next week, and that will have the on-screen controls that some users had requested.

  • Kevin

    This game is old news now, but just FYI v1.3 is out. 1.3 has on-screen controls for missiles and bombs, so enjoy the carnage.

  • Kevin

    This game is old news now, but just FYI v1.3 is out. 1.3 has on-screen controls for missiles and bombs, so enjoy the carnage.