Here are some easy ways you can get some easy achievements in some games. These are game that let you use cheats to get achievements 
Blazing Angels:
(Note: Enter at main menu.)
God Mode: Hold LT + press XYYX then hold RT + press YXXY
Bully: Scholarship Edition:
(Note: Enter on a second controller anywhere in the game, except cutscenes.)
Full Health: Hold LB + press RTRTRT
All Weapons: Hold LB + press ^,^,^,^
All Hobo Moves: Hold LB + press ^,<,v,>,YXAB
All Gym Grapple Moves: Hold LB + press ^,<,v,v,YXAA
Infinte Ammunition: Hold LB + press ^,v,^,v
Massive Money Gain: Hold LB + press YXBA
Cars:
(Note: Go to Options, Cheats.)
Unlock Everything: IF900HP
Unlimited Boost: VROOOOM
Fast Start: IMSPEED
Cars: Mater-National:
(Note: Go to Options, Cheats.)
Extreme Acceleration: 0TO200X
Unlimited Turbo Boost: ZZOOOOM
Clive Barker's Jericho:
(Note: This will show how to gain the Infinite Ammunition and Faster Health Regeneration cheat codes.)
1. Visit the "Bonus Codes" screen and write down the 5 digit access code.
2. Visit the game's pre-order website and enter: AGEH-56JW-X2GB-DN1N-EGUT
3. Enter the 5 digit code mentioned in step one. Select the Xbox 360 as your console and hit submit.
Dead Space:
(Note: Enter in the pause menu. Most are one time use.)
5 Nodes: YXYXXYXXYXXY
2 Nodes: YXXXY
10k Credits: XYYYXXY
5k Credits: XXXYXY
2k Credits: XXXYY
1k Credits: XXXYX
Far Cry: Instincts Predator:
(Note: Pause the game and access the "Code Entry" menu.)
Restore Health: ImJackCarver
Unlimited Feral: Bloodlust
Unlimited Ammunition: UnleashHell
Feral Attack in Early Levels: FeralAttack
Ghost Recon: Advanced Warfighter:
(Note: Pause, hold down the buttons in this order: LT,RT,Back Button. Keep them held and enter the cheats below.)
Player Invincibility: YYX,RB,X,LB
Team Invincibility: XXY,RB,Y,LB
Full Health: LB,LB,RB,X,RB,Y
Unlimited Ammunition:
(Note: Resets when weapon is changed.)
RB,RB,LB,X,LB,Y
Guitar Hero II:
(Note: Enter at main menu.)
Hyperspeed:
B,O,Y,O,B,O,Y,Y
Unlock All Songs (NTSC):
B,Y,O,R,O,Y,R,Y,R,Y,R,Y,R,Y
Unlock All Songs (PAL):
B,Y,O,R,Y,O,B,Y,B,Y,B,Y,B,Y,B,Y
Guitar Hero III: Legends of Rock
(Note: Go to Options, Cheats.)
Hyperspeed:
O,B,O,Y,O,B,O,Y
Unlock Everything:
(G+R + B+O)(G+R + Y+B)(G+R + Y+O)(G+B + Y+O)(G+R + Y+B)(R+Y + B+O)(G+R + Y+B)(G+Y + B+O)(G+R + Y+B)(G+R + Y+O)(G+R + Y+O)(G+R + Y+B)(G+R + Y+O)
Gun:
Complete the game, return to the starting area. From the LEFT of the HIGHER boulder leading up to a ledge and gap, jump and spur your horse so it lands on top, then onto the ledge. Cross the next two areas. Stand between the only two rocks in the water. Press and hold LB+LT+RB+RT+A for a few seconds until you hear a strange sound. Go to Options for a new selection - GUN. Choose any Mission or Cutscene. You will retain ALL weapons, items, and skills
Kung Fu Panda:
(Note: Enter in Main Menu, Extras, Cheats.)
Invincibility: v,v,>,^,<
Infini-Chi: v,>,<,^,v
Full Upgrades: <,>,v,<,^
Lego Indiana Jones:
(Note: Enter on the blackboard in math class at Barnett College.)
Treasure x10: VI3PS8
Regenerate Hearts: MDLP69
Lost Planet: Extreme Condition + Colonies:
(Note: Codes must be reactivated every level. Codes only work on easy mode. Pause the game to enter the codes.)
Infinite Health:
v,v,v,^,Y,^,Y,^,Y,^,^,^,v,X,v,X,v, X,<,Y,>,X,<,Y,>,X,LB + RB
Infinite Ammunition:
RT,RB,Y,X,>,v,<,LB,LT,RT,RB,Y,X,>,v,<,LB,LT,RT,LT, LB,RB,Y,<,v,X,LB + RB
500 Thermal: ^,^,v,v,<,>,<,>,X,Y,LB + RB
Major League Baseball 2k6:
(Note: Go to My 2k6, Cheats.)
Unlock Everything: Derek Jeter
Need For Speed ProStreet:
(Note: In Careers Mode, under Options then Cheats. These are one-time use only.)
$2000: 1MA9X99
$4000: W2IOLLO1
$8000: L1IS97A1
$10,000: CASHMONEY
$10,000: REGGAME
$10,000: 1MI9K7E1
Five Repair Tokens: SAFETYNET
The Orange Box:
(Note: Enter these can be entered at anytime, on any level.)
Half-Life 2
Invincibility: LB,^,RB,^,LB,LB,^,RB,RB,^
Restore Health by 25: ^,^,v,v,<,>,<,>,B,A
Restore Ammo for Current Weapon: Y,B,A,X,RB,Y,X,A,B,RB
Portal
(Note: Link for how to use the cheats in challenges.)
Place A Portal on Any Surface: YABABYYA,<,>
Create Box: v,BABY,v,BABY
Invincibility: LB,^,RB,^,LB,LB,^,RB,RB,^
Peter Jackson's King Kong:
Cheat Mode:
(Note: Pause the game,hold down LT+LB+RT+RB and enter v,^,Y,X,v,v,Y, Y. Release and the "cheat" menu will appear.)
Invincible: 8wonder
999 Amunition: KK 999 mun
Unlimited Spears: lance 1nf
Machine Gun: KKcapone
Revolver: KKtigun
Shotgun: KKsh0tgum
Sniper Rifle: KKsn1per
There ya go.
These may help ya alot
Blazing Angels:
(Note: Enter at main menu.)
God Mode: Hold LT + press XYYX then hold RT + press YXXY
Bully: Scholarship Edition:
(Note: Enter on a second controller anywhere in the game, except cutscenes.)
Full Health: Hold LB + press RTRTRT
All Weapons: Hold LB + press ^,^,^,^
All Hobo Moves: Hold LB + press ^,<,v,>,YXAB
All Gym Grapple Moves: Hold LB + press ^,<,v,v,YXAA
Infinte Ammunition: Hold LB + press ^,v,^,v
Massive Money Gain: Hold LB + press YXBA
Cars:
(Note: Go to Options, Cheats.)
Unlock Everything: IF900HP
Unlimited Boost: VROOOOM
Fast Start: IMSPEED
Cars: Mater-National:
(Note: Go to Options, Cheats.)
Extreme Acceleration: 0TO200X
Unlimited Turbo Boost: ZZOOOOM
Clive Barker's Jericho:
(Note: This will show how to gain the Infinite Ammunition and Faster Health Regeneration cheat codes.)
1. Visit the "Bonus Codes" screen and write down the 5 digit access code.
2. Visit the game's pre-order website and enter: AGEH-56JW-X2GB-DN1N-EGUT
3. Enter the 5 digit code mentioned in step one. Select the Xbox 360 as your console and hit submit.
Dead Space:
(Note: Enter in the pause menu. Most are one time use.)
5 Nodes: YXYXXYXXYXXY
2 Nodes: YXXXY
10k Credits: XYYYXXY
5k Credits: XXXYXY
2k Credits: XXXYY
1k Credits: XXXYX
Far Cry: Instincts Predator:
(Note: Pause the game and access the "Code Entry" menu.)
Restore Health: ImJackCarver
Unlimited Feral: Bloodlust
Unlimited Ammunition: UnleashHell
Feral Attack in Early Levels: FeralAttack
Ghost Recon: Advanced Warfighter:
(Note: Pause, hold down the buttons in this order: LT,RT,Back Button. Keep them held and enter the cheats below.)
Player Invincibility: YYX,RB,X,LB
Team Invincibility: XXY,RB,Y,LB
Full Health: LB,LB,RB,X,RB,Y
Unlimited Ammunition:
(Note: Resets when weapon is changed.)
RB,RB,LB,X,LB,Y
Guitar Hero II:
(Note: Enter at main menu.)
Hyperspeed:
B,O,Y,O,B,O,Y,Y
Unlock All Songs (NTSC):
B,Y,O,R,O,Y,R,Y,R,Y,R,Y,R,Y
Unlock All Songs (PAL):
B,Y,O,R,Y,O,B,Y,B,Y,B,Y,B,Y,B,Y
Guitar Hero III: Legends of Rock
(Note: Go to Options, Cheats.)
Hyperspeed:
O,B,O,Y,O,B,O,Y
Unlock Everything:
(G+R + B+O)(G+R + Y+B)(G+R + Y+O)(G+B + Y+O)(G+R + Y+B)(R+Y + B+O)(G+R + Y+B)(G+Y + B+O)(G+R + Y+B)(G+R + Y+O)(G+R + Y+O)(G+R + Y+B)(G+R + Y+O)
Gun:
Complete the game, return to the starting area. From the LEFT of the HIGHER boulder leading up to a ledge and gap, jump and spur your horse so it lands on top, then onto the ledge. Cross the next two areas. Stand between the only two rocks in the water. Press and hold LB+LT+RB+RT+A for a few seconds until you hear a strange sound. Go to Options for a new selection - GUN. Choose any Mission or Cutscene. You will retain ALL weapons, items, and skills
Kung Fu Panda:
(Note: Enter in Main Menu, Extras, Cheats.)
Invincibility: v,v,>,^,<
Infini-Chi: v,>,<,^,v
Full Upgrades: <,>,v,<,^
Lego Indiana Jones:
(Note: Enter on the blackboard in math class at Barnett College.)
Treasure x10: VI3PS8
Regenerate Hearts: MDLP69
Lost Planet: Extreme Condition + Colonies:
(Note: Codes must be reactivated every level. Codes only work on easy mode. Pause the game to enter the codes.)
Infinite Health:
v,v,v,^,Y,^,Y,^,Y,^,^,^,v,X,v,X,v, X,<,Y,>,X,<,Y,>,X,LB + RB
Infinite Ammunition:
RT,RB,Y,X,>,v,<,LB,LT,RT,RB,Y,X,>,v,<,LB,LT,RT,LT, LB,RB,Y,<,v,X,LB + RB
500 Thermal: ^,^,v,v,<,>,<,>,X,Y,LB + RB
Major League Baseball 2k6:
(Note: Go to My 2k6, Cheats.)
Unlock Everything: Derek Jeter
Need For Speed ProStreet:
(Note: In Careers Mode, under Options then Cheats. These are one-time use only.)
$2000: 1MA9X99
$4000: W2IOLLO1
$8000: L1IS97A1
$10,000: CASHMONEY
$10,000: REGGAME
$10,000: 1MI9K7E1
Five Repair Tokens: SAFETYNET
The Orange Box:
(Note: Enter these can be entered at anytime, on any level.)
Half-Life 2
Invincibility: LB,^,RB,^,LB,LB,^,RB,RB,^
Restore Health by 25: ^,^,v,v,<,>,<,>,B,A
Restore Ammo for Current Weapon: Y,B,A,X,RB,Y,X,A,B,RB
Portal
(Note: Link for how to use the cheats in challenges.)
Place A Portal on Any Surface: YABABYYA,<,>
Create Box: v,BABY,v,BABY
Invincibility: LB,^,RB,^,LB,LB,^,RB,RB,^
Peter Jackson's King Kong:
Cheat Mode:
(Note: Pause the game,hold down LT+LB+RT+RB and enter v,^,Y,X,v,v,Y, Y. Release and the "cheat" menu will appear.)
Invincible: 8wonder
999 Amunition: KK 999 mun
Unlimited Spears: lance 1nf
Machine Gun: KKcapone
Revolver: KKtigun
Shotgun: KKsh0tgum
Sniper Rifle: KKsn1per
There ya go.
These may help ya alot
