F.E.A.R. 3

This achievement is best done in single player as every link you do will count as a challenge so long as you pick the body up.

It can be done right on the first level if you so choose. The level is short, yet long enough for the achievement. Choose pointman. Get your pistol, shotgun, and machine gun kills as well as stabbing 3 people in the back. Get the big spender challenge by letting a full slow-mo bar run out 3 times. Also get the 10 grenade kills, 5 stun grenade stuns and the Alma doll.

The rest are things that come almost naturally by playing, such as challenges for being in cover, killing from cover, headshots, and killing 50 people while in slow-mo.

(Press select to what challenges you are closest to completing if you get lost)

These things combined with the 13 or so bodies you link with will nab you the achievement as soon as you hit 30. I did this while trying to beat the score for the level on insane mode all without much problem.

If you find this method to be too difficult, interval 5 is the way to go. It's the longest if not one of the longest intervals in the game. It has loads of enemies and a wide selection of weapons to get challenges done with.

Easiest way is to go to interval 5 since its the longest one and pick pointman so you can get the slow mo challanges and the cover challenges and then get the weapon challanges...then the one that helped me get the achievement before the level was even close to being completed was the psychic links because they count as challenges too...you can get all by using this link as a guide..let me know if this helped guys :-)

Here is a list of thing you need to do to get this achievement!
1. Psyhco links glowing bodys (these stack and count, if you have found 8 all you need is 22 left).
2. Supersonic, 30 for first tier then 50 for second. slow-mo kills.
3. hard boiled, 50 kills in a row first tier, second 100 kills in a row.
4. Gatherer, pick ups collected, 15, 30, 60, i shot one bullet at a weapon on the ground recieved one bullet back did it 60 times.
5. Pitching a tent, us cover for 100 seconds then 200 seconds.
6. All in the reflexes, be in slo-mo for 60 seconds, then 120.
7. Big spender, drain slow mow full for 3x. just usung slow mow gets this over time.
8. Cover up artist, 10 kills from cover then 25.
9. Mommy, collect the Alma dolls probably stack as well.
10. Sweet science, 15 melee kills
11. SMG, C3A3, get 25 kills, sniper get 15 kills.
12. Idecent exposer, blind 5 enimies with flash bang grenades.
13 Slaughter, on level 4 you get a PA or EPA me suit thing get 20 kills with it.
14. Head hunter, 25 head shots, then 50.
15. Menace 3 kills with explosions, not grenades gas tanks ect.
16. Hot potato 10 frag grenade kills
17. 10 kills in a row without dying.

There may be more challenges but thats plenty right there. I got this during mission 4 my stats from top to bottom where 8,9,5,12 i also got th score ovr 100,000 with this list given.