A1
: 
If u have a gameskark then put in infinate zap and inf health then just take the brains from ur people and do mind flash
A2
: 
This is the one where you defend your tents?
One of the books says, "Use your saucer, heat ray only". I was never able to get that to work, in about 29 tries - and trying to pull individuals with abduct just makes it worse.
I tried about 20 times from the ground, too. Finally got it, from the ground. The mission seems to get longer every time you kill a cult member. So don't kill cult members. Avoid using Gastro if he has been mobilized. Get a tough enemy and set them to protect, when that one is killed, get another. Get them shooting at you, not the tent. Use mind flash or free love to freeze everyone and transmog cars, then rush back to the tent.
If you can catch vehicles coming in and use meteor shower on them, that seems to work.
The one that worked for me I ended up with three tents, and did almost nothing to defend the other two.
If the white Ninjas are there they will help you on the protect mission -- they would only show up occasionally.
Save 1 tent - the isolated one next to your saucer - you can protect the ground level ones, but once they are gone, stay up.
A3
: 
That's how u do it if ur a cheater. make sure u have a full mind flash. get outside the ring of tents so you have the best view of oncoming enemies. in the beginning, it's a bunch of cops that come from the left. use your main weapon (i used zap-o-matic) to beat them. in the first stage, it really helps if you can quickly disperse the enemies and preserve the tents. also, if you see the white ninjas praying, put em to use! target with L1 (or whatever you use for xbox) and make him protect you. you'll need all the help you can get. most of the enemies come from the left in the beginning. however, some might sneak past. don't worry about them too much, but when you get a break, make sure that there are none back there. after a while, the army will join, as well as KGB and the yakuza. just keep your same basic strategy. a good way to clear the area if you start to feel overwhelmed is to use gastro. he can clear out some enemies while you take a breather to stock up on ammo (p.s. it's also best if you have full ammo in everything that you would plan on using [i.e. meteor strike, disintegrator ray, gastro, ion detonator]) also, when you see some enemies running in from a distance, like kgb agents or the army, feel free to use a meteor strike. after a while, black ninjas will come in, and more enemies will attack the higher ground. this is the point where I used gastro, as well as the mind flash. I also enlisted the protection of a black ninja during the mind flash. these guidelines helped me to bet the level. however, it still takes some skill. but, if you got that far you must have the skill.
A4
: 
On two player mode get in the ship and go where the road makes a L have the death ray go back and forth guarding the hill tents and 2 player shoot the oncoming soldiers, police, etc... from the left