Achievements help - mixed games Options

[Loki]

I was looking through my list of achievements and realised just how many I had on some games that were unfinished. Can anyone help me get these, or for the single player ones give me a clue as to how to get them please? I will keep them in game order to make it easier.

Forza 2
Underdog (win race with lowest PI car) Complete - thanks Winters
Hard Charger (start in 8th and finish 1st) Complete
1,000,000 online credits (I have just 2,750 at the moment!)
Car Broker (buy or sell 10 cars online)
The 4 secret ones (no idea what they are or how to get them)
Plus most of the single player ones that I will obviously have to work through (I'm currently level 29)

Hexic
Oyster-meister (surround one piece with 6 starflowers)
Big cheese of the south seas (cluster of 3 black pearls)
Grand pearl pooh-bah (surround one piece with 6 black pearls)
Plus some other single player ones that I will eventually get I guess

GRAW
Heavyweight - MP (get 10,000 kills)
Falcon - MP (shoot down 100 helicopters in MP)
Sniper - MP (500 head shots)
Perfect Chapter 1 - MP (Prim and Sec in chapter 1)
Explorer - MP (win 5 team or solo matches on each original MP map with at least 5 different gamertags in the room)
Assassin - MP (find and kill an opponent who has the assassin achievement)
Crack Shot - MP (kill 10 players with gunshots and at least 5 gamertags in the room without reloading or dying)
Plus some other ones I'll never get so don't worry about them

Perfect Dark Zero
Complete Co-Op Agent
Complete Co-Op Secret Agent
Complete Co-Op Dark Agent
Play 100 DM games
Play 1000 DM games
Play 100 DarkOps games
Play 1000 DarkOps games
1000 kills in Killcount
1000 kills in Team killcount
100 flags captured
10 players infected
100 players infected
1000 players infected
10 territories held
100 territories held
100 rounds survived
1000 rounds survived
10,000 CR property destroyed
100,000 CR property destroyed
10 minutes survived
100 minutes survived
100 sniper kills
1000 sniper kills
100 headshot kills
1000 headshot kills
100 melee kills
1000 melee kills
1000 explosive kills
1 coop mission on dark agent
5 coop missions on dark agent
Plus a couple of single player efforts that I'll never get

Gears of War
Honor Bound (2/3s of COG tags, any difficulty)
For the Fallen (all COG tags, any difficulty)
Clusterluck (3 enemies at once 10 times)
A Series of Tubes (host and complete 50 ranked matches)
Don't you die on me (revive 100 teammates in ranked matches)
All of the weapon specific ranked matches ones
Don't Hate The Player (finish ranked match with highest points)
The other ones I've either got or in the case of the multiplayer ones, totally ridiculous

PGR 3
Yes, 3 not 4.
Style Racer Badge
Pro Racer Badge (platinum medal using manual)
Gold Champion (complete all gold)
Platinum Champion (complete all platinum)
Rank 1 (I assume comes when you get to it)
Exotic Car club (7 exotic cars, including McLaren F1 LM, Shelby GT500, Ford GT40 MK1, Corvette ZR1). I'm sure I've bought those cars but it just isn't registering.
Photographer (Take a phone in every city in the game). I've done this but it isn't working either.
Mouse Master (win cat and mouse in the E class vehicle)
Cat Champion (win cat and mouse in non E class vehicle)
Team Cone Capture Champion (winning team in Team Cone Capture)

If anyone has any hints, tips, suggestions or can make themselves available for the MP stuff, I'd be really grateful.

Cheers

[Winters]

Forza 2
Underdog (win race with lowest PI car)
Pretty easy to do if you drop the AI level down

Hard Charger (start in 8th and finish 1st)
On the factory standard levels, you always start at the back, so winning any race will do.

1,000,000 online credits (is that just the money I have, or is it online only?)
Just got to keep plugging away.

Car Broker (buy or sell 10 cars online)
any of us should be able to help with this - just keep selling the same car with a large buyout back and forth.

The 4 secret ones (no idea what they are or how to get them)
Just look them up - some of them are about owning all the cars from certain regions.

Plus most of the single player ones that I will obviously have to work through (I'm currently level 29)
IDD

Hexic
Oyster-meister (surround one piece with 6 starflowers)
All the achievements in Hexic are just down to practice. There are no quick tricks to getting them.

Big cheese of the south seas (cluster of 3 black pearls)
Grand pearl pooh-bah (surround one piece with 6 black pearls)
These will take you hours to do

Gears of War
Honor Bound (2/3s of COG tags, any difficulty)
There are quite a few good lists online as to where all the cogs are

For the Fallen (all COG tags, any difficulty)
"

Clusterluck (3 enemies at once 10 times)
Best tactic, first chapter on easy - the bit where they all burst through the door - just lob a load of grenades when they come through. Then reload the chapter and do it again

PGR 3
I have all of these (apart from platinum, but its been that long, I completely forgot where they are best done

[Azazel]

Forza 2
The 4 secret ones (no idea what they are or how to get them)

41. Secret Collector 1
All production cars.
30 points

42. Secret Collector 2
All aftermarket tuner cars.
30 points

43. Secret Collector 3
All race cars.
30 points

44. Secret Collector 4
All cars.

Source: http://www.achieve360points.com/game/forzamotorsport2/

[loki.pa]

Gears of War

Clusterluck, I tried what Winters mentioned and found that I couldn't get the 3 kills required often enough. Theres a bit in Act 3 I think where if you're not carefull you fall through the floor and there are loads of wretches down there. I just ran around for a bit untill 5 or so wretches were following me and then I grenade tagged one of them. You'll get blown to bits but just rinse and repeat 10 times. Easy!

[Loki]

I'll give the two Clusterluck options a go when I get 5 minutes this afternoon. Is anyone around later on for me to do the car broker stuff please?

[loki.pa]

i'll try