Space Invaders Extreme

This achievement can be completed on or offline with 2 to 4 players. I did it online with one other player and bumped it up to five lives.

This is way harder than doing it in single player as you do not get to continue when you lose all your lives.

General tips:

Forget about score. It's all about survival.

Each player should stick to their own side of the screen.

Activate special weapons by shooting 4x enemies of one colour. The blue enemies drop a laser which is the best weapon. Holding RB stops you using the weapon, letting you save it for later.

'Frenzy Mode' is your best friend. To activate it, one player has to shoot 4x enemies of one colour and then 4x of another colour (there is a little indicator gauge in the top right of the screen to help you keep track). This makes a multi-coloured UFO appear (after some yellow arrows). Shoot it to activate a bonus round. Beat the bonus round and you'll be in Frenzy.

When in Frenzy Mode, each player should start each wave from their edge of the screen and work their way towards the centre, firing constantly. This will clear the screens quicker, getting more value out of Frenzy Mode.

Red UFOs also trigger the bonus round and Frenzy Mode.

Yellow UFOs trigger a roulette mode where you shoot a circle of UFOs and get a bonus. Aim for the yellow ones (extra life) by shooting when they are at 3 o'clock and their circle is contracted.

On later levels, it is harder to get Frenzy Mode opportunities. If you see an opportunity to get two chains of four enemies, COMMUNICATE! Tell the other player to stop shooting (so as not to break your chain).

The worst two enemies are the spinning ones as they spread bullets everywhere and the ones that are marked out with little white blobs at the top of them as they descend when shot. The worst thing you can do is let an enemy get down the bottom as both players will lose a life.

Boss Guide:

Boss 1 - really easy. Just keep shooting and aim for the flashing box on the enemy until it goes red and is finally destroyed.

Boss 2 - watch out for the shielded enemies, they will return your shots to you with interest. Shoot 4x unshielded enemies to get a laser and use that to target the middle of the UFO. Stay left on the screen as the enemies come from that side and will not engage their shields right away.

Boss 3 - shoot each UFO until it is red. Do not shoot the round bullets as these will split as shoot bullets diagonally across the screen.

When both UFOs are red, they merge. Position each player on opposite sides and try to take out the flashing box. Watch out for the triple lasers they shoot, don't get underneath them.

Boss 4 - actually a very easy boss as long as you are careful. Shoot 4x unshielded enemies to get a bullet powerup and then shoot the small shielded enemies and they deflect the bullet horizontally. Make sure they are at the same height as the boss to damage him. Do not shoot the boss directly as his shield will mess you up.

Boss 5 - I've not got a great strategy for this except to get under him and shoot, shoot, shoot. You aren't aiming for a particular weak spot but will need to kill him quickly.



www.peoww.co.uk

Ok I finished this achievement earlier.
Now I'm not sure if this is already common knowledge but it helped us anyway.
If you fill out the blocks with words which are in the background, fill them all out and you get an extra life.
These consist of getting a row of the same colour, columns of the same colour, same type or same shape. Rows I think are in 8's and the others I believe are 4's.
Using this method plus the occasional yellow UFO for the roulette, we had about 9 lives going into level 4, we actually ignored going into fever mode until we filled out the words.

Also on the roulette if you click as the yellow invader is about 9 O clock most of the time you will get the extra life.

Well this can be obtained 2-4 Playes online not sure about local yet, so can't confirm it if anyone can that be great!!!

It's best to do this with 4 decent plays as you blast though the levels no problem 4x firepower but you do have to share the same amount of lifes (5) once it's down to 0 and you die your ship will be put to the side the other people who didn't die carry on playing untill they die, if only one of you makes it you should all get the achievement.