This is the first episode of Angry Birds. As you may have guessed, the Birds have lost their eggs...
World 1
Level 1-1:
Simply fire the Red Bird right in front of you to hit on the edge of the longest plank in the middle of the structure.
Level 1-2:
For this level you should aim high, up over all four obstacles, aiming to bounce off the slope, knock the top edge of the right-most pig, and send it falling to the left and pushing all the others out.
Level 1-3:
This is an easy level. Send a Red Bird into the ball and it will roll down to the right and into the pigs waiting below.
Level 1-4:
This level is essentially an edurance test - send your first Red Bird at the structure, trying to hit it hard on the side. You need to break through the glass and try to tip the stone structure so that it squashes the pig. Repeat this until you succeed in destroying the entire structure.
Level 1-5:
Fire the first Red Bird into the middle section of the structure - where there are three pigs, two wooden boards and one stone block. Hit the stone block in the side and it should bring the big boulder falling down and squashing all pigs below.
Level 1-6:
Another simple level where you just need one bird for each of the structures. Aim for the upper-left corner of each structure to take them out one-by-one.
Level 1-7:
Aim for the bottom wooden plank, trying to hit it flush on the side. If you've hit it hard enough, both pigs should roll off the structure and the one in the middle should be squished.
Level 1-8:
Notice how there are two sets of stone, wood and glass blocks on the top of the ground in the middle of this level. You want to hit the first pile of blocks, in the middle of the wooden square. This should send the glass square up and to the right - if you're lucky, it will take out the right-most pig, while the Red Bird carcass will fall back and take out the left-most pig. If you're very lucky, the large boulder in the middle should roll off and squash the final pig, if you hit the first block hard enough.
Level 1-9:
This easy level just requires you to fire a Red Bird at the upper-left wooden corner of the first structure. It should sway to the right, crushing everything beneath it.
Level 1-10:
For this level, fire the first Blue Bird in an arc towards the left-most triangle of glass blocks. Split the Bird before it hits so that the remnants go into the second structure. If another Bird is needed, fire it and split it into the second structure, hitting the stone beams. Then, the structure should collapse, taking out anything left from the first one.
Level 1-11:
Launch the Red Bird into the stone block at the very top-left of the first structure. If you hit it with enough force, the structure shold fall to the right and take out all of the pigs on this level.
Level 1-12:
Send the Blue Bird into the glass pyramid, on a low trajectory - split it before it hits so that you get maximum results from this single bird. If any pigs remain after this, simply finish it off with another bird.
Level 1-13:
Level 13 is an easy one - just send your Blue Bird into the top-left glass block, splitting just beforehand, to take out all the pigs on this level, and much of the structure.
Level 1-14:
Send a Red Bird into the left upright stone block. This should tip the debris down onto the pigs below and, if you're lucky it will take out everything underneath.
Level 1-15:
You will probably need two Blue Birds for this one. Send them in a high arc, aiming for the center of the level. Split them as you pass over the left-hand tower, and the glass should split, with any debris taking out all of the pigs. You may be able to do it with one Bird, but if two are needed, just repeat to clear up the rest.
Level 1-16:
This level features Yellow Birds, which build up speed as they travel through the air. Send the first one slamming into the side of the structure, hitting the bottom half of it. Repeat this a bit higher up to finish off the right-hand side if necessary.
Level 1-17:
With your first Yellow Bird, send it into the bottom left wooden side of the structure - it should rip through the wood and hopefully deal with all of the pigs. If it doesn't, use another to finish it off.
Level 1-18:
This is a tough level which will normally take at least a few birds to deal with. Start by firing at the bottom of the steps, just above the first pig. You want the debris to fall back down and squash the big below. With the second Bird, fire it just above the second pig, using the same tactic as before. Even if you don't take out the second pig, fire your third bird just above the third pig. If the upper pigs still remain, fire the next Bird in the same position as the last one - hopefully some debris will fall back and assist you in taking out the remaining pigs.
Level 1-19:
Use the Blue Bird by splitting it and removing the glass on the left-hand side of the structure. You are aiming to create a gap to fire the next bird, a Yellow Bird, through. Do this, and it should speed up through the gap and take out the pig in the middle.
Level 1-20:
This level takes a few Yellow Birds to deal with. Fire the first one through the bottom left wooden corner of the structure - hopefully you will reach the pigs in the middle, but if not, follow it up with a second Yellow Bird. Finally, for any pigs remaining, send a Yellow Bird up high and down through the wooden top of the structure.
Level 1-21:
Fling a Blue Bird into the left-hand side of the structure, aiming at the first pig. With the first Red Bird, you need to clear the non-wooden blocks away from the center of the structure so that the next bird has a clear path to the middle tower. Send the second Blue Bird into the glass remaining on the right-hand side, splitting it just before hand. Tidy up anything remaining using the Red Bird and Yellow Bird. Remeber to save the Yellow Bird fo the helmetted pig if necessary, as its strength is against the wood that surrounds it.