Bejeweled 2 Achievement List - To get all the achievements in the game, do the following things:

Unlockables

Action Mode Get to level 9 in action mode

Cascade 8 Get a x8 cascade during any game mode
Classic Mode Get to level 18 in classic mode
Cognito Mode Get 50,000 in Cognito Mode

Endless Mode Complete level 280 in endless mode

Finity Mode Get to level 9 in finity mode

Hyper Mode Get to level 9 in hyper mode
Hyper1000 Make 1,000 power gems across all your games

Multi Mode Unlock Twilight, Hyper, Cognito, and Finity mode.

Power10000 Make 10,000 power gems across all your games
Puzzle Mode Complete all 80 levels in puzzle mode

Twilight Mode Complete level 10 in twilight mode

Geometry Wars Achievement List - Do the following things to unlock all the achievements in the game:

Mad Cat Skillz Collect 9 lives
Multitastic Earn a 10x multiplier

Pacifism Survive the first 60 seconds of the game without firing or using a bomb

Quatermaster Collect 9 bombs

Score 1,000,000 Earn 1,000,000 points
Score 100,000 Earn 100,000 points
Score 250,000 Earn 250,000 points
Score 500,000 Earn 500,000 points
Survive 1,000,000 Earn 1,000,000 points without dying
Survive 100,000 Earn 100,000 points without dying
Survive 250,000 Earn 250,000 points without dying
Survive 500,000 Earn 500,000 points without dying

Hardwood Backgammon Achievements - Unlock these in the game.

Backgammon Baby Win a game with a backgammon. Earn this in Single Player or Xbox Live play.
Backgammon Beginner Win a total of 10 games. Earn this in Single Player or Xbox Live play.
Backgammon Veteran Play a total of 100 games. Earn this in Single Player or Xbox Live play.
Bar Baron Get four of your opponents checkers on the bar at once. Earn it in Single Player or Xbox Live play.

Double Take Win a game with a doubling cube bonus. Earn this achievement in Single Player or Xbox Live play.

Gammon Grabber Win a game with a gammon. Earn this in Single Player or Xbox Live play.

Mega Streaker Win 25 Consecutive games. Earn this in Single Player or Xbox Live play.
Mini Streaker Win 10 consecutive games. Earn this in Single Player or Xbox Live play.

Online Gammoner Complete 10 games in Xbox Live play.

Pied Pipper Win a game by 50 pips. Earn this in Single Player or Xbox Live play.
Pip Master Win a total of 25 games. Earn this in Single Player or Xbox Live play.
Prime Pied Piper Win a game by 75 pips. Earn this in Single Player or Xbox Live play.

Outpost Kaloki X Achievement List - Do the following things to unlock all the achievements in the game:

Adventure Story Complete Finished the Adventure Story
Adventure Story Gold Finished the Adventure Story with all gold medals

Eight-Port Master Achieve a gold medal on The Eight-Port Challenge scenario

Fed and Entertained Completed Adventure Story Chapter 8: Military Madness
Friend of Wally Built a habitat for Wally

Honorary Fish Completed Adventure Story Chapter 10: Deja Vu

Marksman Completed War Story Mission 4: Into the Warp
Max Power Convinced Max Power to lend a hand in War Story Mission 6: The Attack

Sir Protector From Asteroids Completed The Hammer Scenario
Survivor Achieved a Gold Medal time in the Survival scenario

War Story Complete Finished the War Story
War Story Gold Finished the War Story with all gold medals

Texas Hold'em Achievements - Complete each achievement to get the allotted gamerscore.

Unlockables

Card Shark (25) Play 1,000 hands.
Chunk Of Change (15) Build one of your bankrolls up to $100,000.

Gutsy Move (15) Place a bet of $50,000 or more.

I'm All In! (10) Win an All In bet.

Luck Of The Draw (10) Get one of every type of hand from High Card to Royal Flush.
Lucky Day or Crafty Bluffer? (25) Win with a High Card hand of 9 or less.

Millionaire Club (20) Build one of your bankrolls up to $1,000,000.

Poker Initiation (10) Win 10 hands.
Poker King (15) Successfully complete all of the scenarios in Single Player Scenario mode.

Tournament Expert (15) Finish in first place in all Single Player Tournaments.
Tournament Pro (20) Enter and win a Competitive Tournament comprised of 8 players.

Winning Streak (20) Win 10 hands in a row.

Wik: The Fable of Souls Achievements - These are the Achievements that are unlocked by completing the tasks. The gamerscore points are listed next to each Achievement.

Acrobatic Apprentice (G15) Latch-Suck-Spit-Latch in order
Acrobatic Master (G20) Loop-Release-Loop-Release-Loop

Challange Apprentice (G10) Finish 30% of Challange Mode (Will unlock during 34% or 36%)
Challange Master (G20) Finish the Challange Mode

Ghost Master Hero (G15) Beat any Challange's Ghost Time

Liberator of Caged Souls (G25) Collect all story gems and complete game
Loop Master (G15) Get 60 points on Loopnastics

Mouth Full of Bugs (G15) Put 500 bugs in total (challange and story count as one) in Wik's mouth

Perfect Grub Hero (G15) Get all Grubs on 10 Story Levels

Story Apprentice (G10) Finish the Story Prologue Levels
Story Master (G20) Finish the Story Mode
String Looper (G20) Loop Wik 3 Times On One Swing