Successfully complete all training/tutorial stages to unlock the Troll Gamerpic.
Recommended races
Play as an Elf with Katana and Wired Reflexes. You will be able to deflect bullets, and if you get behind someone unaware, they will bleed out. Pair this with smoke and you will almost never die.
Recommended weapons
Use Smartlink with a rifle (regular), and also buy a shotgun. You will be able to destroy almost anything with this combo. Do not buy a rocket launcher as it is not worth the hefty price. Even though it is strong, its lack of ammo cancels its usefulness.
Recommended magic
Buy Resurrect; this is one of the most useful spells. Teleport can be also be useful at times.
Achievements
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
Chapter 1 Training (10 points): Complete Chapter 1 Training.
Chapter 2 Training (10 points): Complete Chapter 2 Training.
Chapter 3 Training (10 points): Complete Chapter 3 Training.
Chapter 4 Training (10 points): Complete Chapter 4 Training.
Chapter 5 Training (10 points): Complete Chapter 5 Training.
Chapter 6 Training (10 points): Complete Chapter 6 Training.
That's One Frustrated Sniper (10 points): Block ten sniper shots with Wired Reflexes.
Brother From Another Mother (20 points): Perform a cross-platform Resurrection.
Mine Is The Superior Platform (50 points): Kill 100 players on the opposite platform.
Healer (10 points): Save your allies with the Tree of Life.
Runner (10 points): Carry the Artifact all the way to the delivery point.
Unstoppable (50 points): Kill ten enemies in a row without being killed.
BFF (20 points): Play Public Match in a Party with players on both XBox 360 and Windows Vista.
Elf Player (10 points): Play as an Elf for one hundred games.
Dwarf Player (10 points): Play as a Dwarf for one hundred games.
Troll Player (10 points): Play as a Troll for one hundred games.
Human Player (10 points): Play as a Human for one hundred games.
Heavy Smoker (10 points): Ignore a great deal of damage using Smoke.
Summoner (10 points): Kill one hundred enemies with your Minions.
Teleporter (10 points): Teleport one hundred times.
Blowhard (10 points): Gust 5 enemies to their deaths.
Resurrector (10 points): Bring back one hundred allies from the dead.
Target Lock (10 points): Kill one hundred enemies with SmartLink active.
Trollhammer (10 points): Kill one hundred enemy Trolls.
Elf Bane (10 points): Kill one hundred enemy Elves.
Dwarf Scourge (10 points): Kill one hundred enemy Dwarves.
Street Samurai (20 points): Kill one hundred enemies with the Katana.
Popgun (20 points): Kill one hundred enemies with the Pistol.
Lead Hose (20 points): Kill one hundred enemies with the Minigun.
Tatter Tatter (20 points): Kill one hundred enemies with the Rifle.
Sniper (20 points): Kill one hundred enemies with the Sniper Rifle.
Shotty (20 points): Kill one hundred enemies with the Shotgun.
Special Delivery (20 points): Kill one hundred enemies with Grenades.
Master Blaster (10 points): Kill one hundred enemies with the Rocket Launcher.
100 Wins (100 points): Win 100 games during your Shadowrun career.
Well-Rounded (20 points): Win a Public Match game as each race.
Well-Traveled (20 points): Play a Public Match on each map.
3 for the Price of 1 (25 points): Kill three enemies with one grenade.
Zombie Scores! (20 points): Deliver the Artifact while bleeding out.
Assistant (20 points): Get a 5:1 damage-to-kill ratio.
That Was Close (20 points): Kill the Artifact carrier less than ten meters from the delivery point, and win the round.
Small World (20 points): Play Public Match with players on both XBox 360 and Windows Vista.
Master Thief (25 points): Deliver the Artifact untouched despite heavy defense.
You're Coming With Me (25 points): Avenge your own death!
Additionally, there are six secret achievements, three of which are currently unknown:
Triple Rez (10 poionts): Resurrect three allies at once.