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I have been playing Robo Defence a lot lately but I can't really get beyond level 2 because I haven't yet found an opening strategy which would work effectively. Can you recommend any good opening strategies?

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Remember to buy upgrades too. The best opening strategy will not help if your starting guns are too weak to kill the first guy! (That's probably not at level 3, but pretty soon after that.) –  WillfulWizard Aug 18 '10 at 19:55

10 Answers 10

Long Paths

Instead of running straight towards the exit have them run back and forth between your guns. This means that in the beginning you should favor "many guns" over "good guns" until you have at least some parcour for them to cross.

Strong Points

Check the ranges of your cannons. Those that encompass the largest area on your pathway should receive the first and the most upgrades.

But don't focus on just one such strong point. Have at least two with sufficient distance so that unit which slip through the first by moving in the shadow of larger units can be addressed later in their journey.

Good Combinations

Cannons with splash or area damage should be placed where many enemies will be at together. This means either at the beginning where the herd is still large or at places where units are slowed down and thus closer together.

Anti Air

Always consider that you need some anti air defence later on. Don't rely on a strong frontline. It's better to have them under fire the whole way.

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my basic strategy is 2 or 3 guns (the blue ones) that force the enemy up. Then add a rocket or two up. Use more guns to force them back down to the middle, and then put some rockets in the middle to counter the eventual air ones, then I'll throw a slow one behind the rockets to help them out.

so... let's see if this works... W=wall, S=Start, G= Gun, R=Rocket, S=Slow

W    G
W R  G
W G  R
S G  RS
WG   R
W
W
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I use this:

W       G       G
W   S   G   S   G   S
W   R   R   R   R   R
W   R   R   R   R   R
W   R   R   R   R   R
B   S   R   S   R   S 
W R R   R   R   R   R
W   R   R   R   R   R
W       S   G       G
W           G       G
W   W W W W W W W W W W W W W W W 
W
W
W
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Hello, and welcome to gaming. It looks like you had some formatting issues, but I think I've fixed them for you. Cheers! –  Raven Dreamer Feb 20 '12 at 23:37

No coming out of this with properly upgraded towers. not even in level 100 M=Air missile

WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
       RRR     RRR
   RRR RRR RRR RRR RRR
   RRR RRR RRR RRR RRR
   MMM MMM MMM MMM MMM
e  MMM MMM MMM MMM MMM
RRRMMM MMM MMM MMM MMM
RRRRRR RRR RRR RRR RRR
RRRRRR RRR RRR RRR RRR
   RRR RRR RRR RRR RRR
   RRR     RRR     RRR     
WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
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I usually build a long maze. The principles are as follows:

  1. All towers form one long vertical maze (picture below)

  2. Horizontal middle line is designed to be for killing planes

    • Early in the level, rocket launchers (not upgraded) are placed in 3 middle rows - within the overall maze plan
    • Every second column central tower is slow tower
    • When you are weak, you may need to first upgrade to anti-aircraft guns instead of going rocket=>AA launcher.
    • Later in the levels, upgrade rockets to anti-aircraft
    • As soon as you can afford the teleport upgrade, somewhere around wave 15, make sure to buy at least one and place near the exit to catch planes.
    • By wave 60, I have ~6-7 teleport towers in the row for the planes near the exit.
  3. Slow towers every 3 towers in the maze

  4. Upgrade things starting with middle 3 rows, again to kill planes better.


Here's my starting map:

WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
W   G   G                           W
W S G S G                           W
W G G G G                           W
W G G G G                           W
W G R R R   etc...                  W
  S R S R S                       T 
WG  R R R R                         W
W   G G G G                         W  
W GG  G S G                         W
W     G   G                         W
WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW

Note: you build the maze from start to finish, until the third column. (Caveat: After that, you may build little bulwarks around middle row, to lead all not-yet-killed things to the middle-row teleports - see the order 22-26 and 30-35).

Here's an order of building things when I'm on level 250 or so (you may need to use less Rockets initially on lower levels when you have less upgrades)

WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
W    7     28                       W
W 6  8     27                       W
W 5  9     26                       W
W 4  10    24                       W
W 3  11 22 23                       W
  2  12 21 34                T(25) 
W1   13 20 29 R                     W
W    14 19 35 31                    W  
W1516   18    32                    W
W       17    33                    W
WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
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I put the first gun towers in a line, separated to the maximum distance where every enemy can be hit at all points. As the game goes on, I turn this into a path that weaves back and forth across the map. The further you make them travel the more damage you can do to them. Using this way I've gotten to round 100 on level 9.

Also, put in lots of upgraded rocket launchers and upgraded freeze towers.

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W    R
W R  S
W G  R
S G  G R A
WGS  R S
W    G R A
W F*SG 
W
WGGGR^

(F* upgrade once the second column is done typically, and add a second set of RSR/AAs same position)
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and try to add a mortar into the second columns base asap –  mfg Aug 24 '10 at 14:04
WRRRRRRRRRRRRRRRRRRRRRRRRR
WR            GR               GR
WR   GR   AR     AR    AR
B       AR   AR     AM    AR
WGAGS    AR     AR    AR
W                GR    GR
W   RRRRRGR   GR
W                           GR
WWWWWWWWWWWWWWWWWWWWWWW 

I do this basic template from one side to the other. And I usually try to keep slow towers along the aircraft route. And as the level increases, I switch out some of the gun for flame and I keep a few mines towards the exit. Sometimes I'll take a row of rockets at the start and make them into artillery. Then I sell everything once I get to 98/99/100 lvls for that boost in final score.

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This is how i build.

many rockets initially, eventually no guns, they will be changed to either inferno towers or rockets. at the end I have lots of tp-towers

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First of all, click REWARD POINTS and upgrade everything to level 2. Then play again. Then download the paid version of the game. Then play for a month until most levels are nicely above 30, you play above level 200 and try SURVIVAL MODE, where that last level is 1000-100!

After that you can have fun with the TOWER MIX. The best one is 00011, but I just found Rocket Heaven!! 58730 > Rockets are expensive: 38, 57 and 96 for upgrades with GIGANTIC range (like 80% of the field). It's not raining rockets, it's a complete downpoor! A toiletflush! Turrets are as cheap as bricks to build a maze and the Slowtowers are 15, 15, 15 and work well.

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