iPhone Quality Index

Sentinel 2: Earth Defense

Sentinel 2: Earth Defense

us No DPad 17 Jul 2009 10 Read the review
us Slide To Play 14 Jul 2009 10 Read the review
us 148Apps 09 Jul 2009 9.0 Read the review
fr Pocket Gamer France 22 Jul 2009 8.0 Read the review
gb Pocket Gamer 29 Jun 2009 8.0 Read the review
us Macworld 14 Sep 2009 7.0 Read the review
us App Store Review 31 Dec 2016 7.0
Read reviews
us Appolicious 17 Jan 2010 7.0  
us AppSpy 01 Jul 2009 6.4 Read the review
gb TouchGen 20 Jul 2009 6.0 Read the review
***** Sentinel 4: Dark Star is now available! Get the series' latest epic installment here on the App Store! *****

It's war, and this time it's too close to home. The Martian mission may be over, but the aliens haven't finished playing space invaders yet.

Extraterrestrial eyes have turned to a new target: they want Earth, and you're the one that has to say 'no'!
Welcome to the future of TD.

Sentinel 2: Earth Defense expands upon the acclaimed gameplay of Sentinel: Mars Defense. The action takes place across varied, lushly rendered Earth environments, and the alien assault force has grown more vicious than ever. Luckily, human turret technology has also advanced, and the ship weapons system provides a spectacular new way to eradicate invaders!


• Unleash the Sentinel's incredible ship weapons system - if you've got the power to do so...
• Deploy mobile attack drones to harass the enemy and augment static defenses.
• Construct boosters to buff your offense, and upgrade to top-tier towers for devastating special moves!
• Pit yourself against previously unseen members of the star spawned horde.
• Mission mode provides quick tactical challenges. Beat a scenario to earn achievements!
• High score leaderboards and achievements using GameCenter
• Exclusive new music written by Specimen A
• OS3.0 iPod Music Player (OS3.0 or higher required)

• IAP for more custom maps!


• Specialised structures and units provide unique tactical gameplay.
• Use the landscape and destructible defenses to maximize the effectiveness of your weapons.
• Resource harvesting and interest system adds a new dimension of risk and reward.
• Assault mode provides hours of play; endurance mode is an endless challenge.
• Visually stunning environments, towers and enemies with fluid zooming and scrolling.


148Apps.com - INCREDIBLE
"A combination of fantastic graphics and multi-layered complex gameplay make Sentinel 2 the best tower defense game on the App Store."

Appversity.com - EDITOR'S CHOICE AWARD
"one of the highest quality games you’ll find on the App Store"

"If you're into tower defense games, both Sentinel and Sentinel 2 are games you should already own."

Pocketgamer.co.uk - SILVER AWARD
"great value", "a fun, immensely playable game"

** Sentinel: Mars Defense features in Apple's App Store Turns 1 top games list!

** Dominate the universe with Space Station: Frontier! **

** Take the fight to the enemy in Sentinel 3: Homeworld! **

** Look out for Sentinel 4: Dark Star **
Sentinel 2: Earth Defense screenshot #1
Sentinel 2: Earth Defense screenshot #2
Sentinel 2: Earth Defense screenshot #3
Sentinel 2: Earth Defense screenshot #4
Sentinel 2: Earth Defense screenshot #5

To add a Qi badge for Sentinel 2: Earth Defense to your site:

  1. Copy the HTML code snippet and paste it into your site.
  2. The badge will automatically display on your web page with the Sentinel 2: Earth Defense iPhone app's current Qualityindex rating.
Quality Index
Based on
10 reviews
Publisher: Origin8
Formats(s): iPhone-3GS, iPadWifi, iPad3G, iPodTouchThirdGen, iPhone4, iPodTouchFourthGen, iPad2Wifi, iPad23G, iPhone4S, iPadThirdGen, iPadThirdGen4G, iPhone5, iPodTouchFifthGen, iPadFourthGen, iPadFourthGen4G, iPadMini, iPadMini4G, iPhone5c, iPhone5s, iPhone6, iPhone6Plus, iPodTouch
Genre(s): Games, Strategy, Entertainment, Action
Filesize: 11MB
Age rating: 9+
App version: 2.0.0
Sentinel 2: Earth Defense image #1
12 Jul 2013
$0.00 to $0.99
05 Jul 2013
$0.99 to $0.00
30 Nov 2012
Version: 2.0.0
09 Nov 2012
$0.00 to $0.99
02 Nov 2012
$0.99 to $0.00
21 Feb 2012
$0.00 to $0.99
18 Feb 2012
$0.99 to $0.00
29 Nov 2011
$0.00 to $0.99
25 Nov 2011
$0.99 to $0.00
25 Oct 2011
$0.00 to $0.99
12 Oct 2011
$0.99 to $0.00
show more
Latest news on Sentinel 2: Earth Defense
26 Nov 2010
Protect your alien base at all costs
Latest features on Sentinel 2: Earth Defense
04 Dec 2010
This week's top stories...
16 Oct 2019
Plus new bosses, and heroes with which to fight them
17 Sep 2019
Asia’s chart-topping RPG spreads its wings like Pegasus
21 Feb 2020
Hottest games on the UK App Store right now
14 Feb 2020
Hottest games on the UK App Store right now
07 Feb 2020
Hottest games on the UK App Store right now
31 Jan 2020
Hottest games on the UK App Store right now
24 Jan 2020
Hottest games on the UK App Store right now
Latest Releases
26 Feb 2020
26 Feb 2020
26 Feb 2020

What is the Quality Index?
WHAT IS THE QUALITY INDEX? Condensing critical opinion from the best websites into one definitive score
CONTACT US All the right links to get in touch with the Quality Index team.
GET LISTED! Only the best sites feature on the Quality Index - does yours deserve to join them?
Rss Feeds
RSS FEEDS Keep tabs on the latest news, scores, and entries in the Quality Index.
SYNDICATION & DATA Looking for independent critical data? Find out how you can start using the Qi on your portal.
ADVERTISE WITH US Give your apps a little extra promotion with the biggest independent iPhone Advertising Network.