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  • Publisher: Origin8
  • Genre: Strategy
  • Device: iPhone
  • Size: 9.1 MB
  • Version: 2.0.0
  • Price: $0.99
  • Average User Rating: 4.5 (2)
App description: ***** Sentinel 4: Dark Star is now available! Get the series' latest epic installment here on the App Store! *****

Sentinel: Mars Defense - a premium sci-fi strategy game.

Its war. Earth's first off-world colony is fighting for survival against a savage alien onslaught!
Mars is under siege and thousands of lives are on the line. Humanitys only hope is you, the commander of the dropship Sentinel. Welcome to the future of Tower Defense!

Deploy sophisticated turret technology across the Martian landscapeto halt the alien advance. Protect walls and barriers that block the enemys path to your base. Upgrade your weaponry, or release robotic drones to repair buildings and harvest resources. Watch the battle for the planet unfold in beautifully rendered, atmospheric graphics.


- 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.
- Compete for high scores with players worldwide using GameCenter!
- Earn GameCenter achievements!
- Challenge your friends highscores directly.
- Save your progress at any time. Automatically saves during a call.


"sets a new benchmark for the rest to match"
"as unique as it is evolutionary"
"New gameplay features alone justifies adding this game to your collection"
- onemoretap.com

"Sentinel is a tower defense game that rises to the top with spectacular graphics, great sound, and intuitive controls."
"...a truly quality game."
- iPhoneAppReviews.net

"Highly addictive" "Amazing graphics" "Lots of polish"
"I spend too much time playing this game!!!"
- Appversity.com

"Excellent Graphics" "Great Sound" "New Strategy Elements"
- TouchMyApps.com

Visit www.origin8.com/sentinel for more information, screenshots, videos and our community forums.

Follow us on www.twitter.com/origin8 for updates for all our apps.

** Continue the fight with Sentinel 2: Earth Defense! **

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

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

** Look out for Sentinel 4: Dark Star - Coming Q4 2014! **

Repair Drone's comments:
Start your devices, ladies and gents - Origin8's classic sci fi tower defense, the original Sentinel: Mars Defense, is about to go FREE for a week! The price is being set as I post - expect the change to trickle through the stores over the next hour or so edit: should be showing up as FREE now.

Sentinel: Mars Defense was selected as one of Apple's favourite games for the App Store One Year Anniversary promotion: check the listings here. It's currently ranked #249 on the entire App Store on Nimblebit's new App Classics project. Need more convincing? Watch the trailer:

Youtube link | Pop Up

Grab it now - you've nothing to lose but your bases! And remember, if you get hooked we'll happily sell you the sequel Sentinel 2: Earth Defense for a mere $2.99
11-05-2009, 01:08 PM
Joined: Aug 2009
Location: UK
Posts: 1,096
whoa! everyone d/l now love this game!

Plus+ id: Fudgeboy
Originally Posted by Kamazar View Post
I find DG incredibly sexy, just sayin'.
Originally Posted by Slapshot View Post
You scare me, you honestly scare me

11-05-2009, 01:13 PM
Joined: Jan 2009
Posts: 1,512
Don't pass this deal up guys, great game!

Front Page Tug Boat Chief Engineer
Check out the awesome Fuzion: Age of Wordcraft website
Follow me and the game on Twitter
preview thread (Fuzion is still in development)
11-05-2009, 01:14 PM
Joined: Nov 2009
Posts: 5
Looks very good, I'll download it as soon as I see it free in canadian stores!

Thank you!
11-05-2009, 01:15 PM
Wooot! Nice.

Game Center ID: Vragal
11-05-2009, 01:16 PM
Joined: Jun 2009
Posts: 10,505
Wow. I`ve killed so many hours with this one. Must grab if you dont have it already
11-05-2009, 01:27 PM
Joined: Oct 2009
Location: the 56th realm of existence
Posts: 5,948

first monsterkill, now this! i think im gonna get sentinel 2 just to support the dev!

Beta tester of 54 games
Originally Posted by crex View Post
Thats a nice lookin gun.
11-05-2009, 01:30 PM
Joined: Aug 2009
Posts: 274
Wow one of my flavorited TD games. No better time for everyone else to join the fun for FREE.
11-05-2009, 02:00 PM
Joined: May 2009
Location: The Underworld
Posts: 9,230
download now! wow, what a great freebie

one of my first TDs i got for my phone

Originally Posted by sizzlakalonji View Post
I don't want to alarm anyone, but I just played this, felt a tingle, rushed to the bathroom, and urinated rainbows and glitter.
Originally Posted by sammysin View Post
Yesss, I'm off for a leak to see if the same happens for me.
11-05-2009, 02:22 PM
Joined: Oct 2009
Location: Katy, Texas USA
Posts: 830
This is great! Picked up Sentinel 2 on sale within the last month or so and love it. I will be downloading this tonight. Along with Monumental, Harbor Havoc, and a couple of others. Very nice day for all of us App addicts!