Estimated achievement difficulty: 2/10
Minimum playthroughs: 1
Miss-able achievements: None!
Glitched achievements: possibly one...
This game is extremely easy and you should be able to get at least 800 within 5 hours easily, and should even be able to get the full 1000G in under 5 hours.
The game is a fairly simple story where you will get 15 gamerscore achievements for every level. The first level may take up to 20 minutes because it is basically a tutorial, but the rest should be under 10 minutes if you hurry. There are also achievements for collecting crystals. There are three crystals in each level, none of them very well hidden.
You can also buy some crystals in the store. After that, to finish up the achievements, there are some challenges to do, none of which being very hard. After that, you should have the full 1000G. I did encounter a glitch on mine where I got the achievement for finding all the crystals in the game, but not all the blue crystals in the game. Considering that the blue crystals are part of the ones you have to collect to get the other achievement, I have no idea how to explain this. However, I looked at guides everywhere and can't find anyone else with any glitched achievements, so I wouldn't worry about it.
The Early Bird - 15 points
Complete Sid's Early Start
See "Going Home"
Baby Proofer - 15 points
Complete Baby Proofing
See "Going Home"
Pursuit - 15 points
Complete The Pursuit
See "Going Home"
Egg Hunt - 15 points
Complete Lonesome Sloth
See "Going Home"
Egbert, Shelly and Yoko - 15 points
Complete Egg Roll
See "Going Home"
Escape! - 15 points
Complete Run Sid Run!
See "Going Home"
A Nutty Rival - 15 points
Complete Nuts About Scratte
See "Going Home"
A Chilled Breeze - 50 points
Complete the Ice Age Levels
See "Going Home"
Meeting Buck - 15 points
Complete Buck to the Rescue
See "Going Home"
Keen Gardener - 15 points
Complete Flower Power
See "Going Home"
Rescue Operation - 15 points
Complete Root of all Evil
See "Going Home"
Helping Scratte - 15 points
Complete Scrat's Jungle Jive
See "Going Home"
Always follow the Rules! - 15 points
Complete Expect the Unexpected!
See "Going Home"
Protect the Babies - 15 points
Complete Noisy Nightlife
See "Going Home"
Ace Shooter - 15 points
Complete Flight of the Pterodactyl
See "Going Home"
Pterosaur Troubles - 15 points
Complete Saving Sid
See "Going Home"
Rescue Sid - 15 points
Complete Rudy's Revenge
See "Going Home"
In Love - 15 points
Complete Scrat's Tar Pit Trouble
See "Going Home"
A Sticky Situation - 15 points
Complete Grave Danger
See "Going Home"
Final Showdown - 15 points
Complete Skeleton Bridge
See "Going Home"
Escaping from the Unknown - 50 points
Complete the levels below the Ice
See "Going Home"
Going Home - 90 points
Complete the Game
You will get all of the above achievements simply by playing through the game. None of the levels are hard at all. If you don't collect the crystals and just shoot straight through, you should be able to beat the game in about 3 hours. You can then go back to each level to collect the crystals, or you can do it while completing the game, it doesn't matter either way.
Red Crystal Collector - 25 points
Collect all 16 Red Crystals
See Dedicated Collector
Blue Crystal Collector - 25 points
Collect all 16 Blue Crystals
See Dedicated Collector
Amber Crystal Collector - 25 points
Collect all 16 Amber Crystals
See Dedicated Collector
Cyan Crystal Collector - 25 points
Collect all 16 Cyan Crystals
See Dedicated Collector
Purple Crystal Collector - 25 points
Collect all 16 Purple Crystals
See Dedicated Collector
Dedicated Collector - 90 points
Collect all 5 sets of 16 crystals
None of the crystals are very hard to find, but they may take a few minutes. If you are trying to get through quickly, you can find some great guides all over the internet. (I used the one at http://www.xbox360achievements.org/f...d.php?t=157965 and I thought it was great).
The Development Team - 10 points
View the Credits
This is the easiest achievement in the game. You can go to the credits through the main menu, or wait until after you beat the game to view them. Surprisingly, they are only about five minutes long, so not bad at all for an easy 10G.
Diego's Challenge - 25 points
Complete Diego's Challenge in under 45 seconds
This isn't very hard, just jump over all the rivers, and powerslide at all the turns. Easy.
Rescue Egbert - 25 points
Complete Egg Roll Challenge 1 in under 40 seconds
It may take a few tries, but eventually you'll have the map practically memorized and be able to run through it in under 40 easy.
Rescue Shelly - 25 points
Complete Egg Roll Challenge 2 in under 1 minute 15 seconds
This one is a bit harder than the first one, but use the same basic principle and you'll have it pretty easily.
Rescue Yoko - 25 points
Complete Egg Roll Challenge 3 in under 1 minute 45 seconds
This one is a bit harder than the first one, but use the same basic principle and you'll have it pretty easily.
Scrat's Time Challenge 1 - 25 points
Complete Nuts About Scratte Challenge in under 1 minute
Just keep moving right and jumping. Easy.
Scrat's Time Challenge 2 - 25 points
Complete Scrat's Jungle Jive Challenge in under 2 minutes 15 seconds
Do the same thing as the first one.
Scrat's Time Challenge 3 - 25 points
Complete Scrat's Tar Pit Trouble Challenge in under 2 minutes
I'm not sure about the time on this one but it wasn't all that hard. Just do the same as the first two.
Momma's Challenge - 25 points
Score 350 or more in the Run Sid Run! Challenge
There is no time limit on this one. Instead, you have to find 350 fruit. Even if you miss a lot of fruit, you should get 350 fairly easily.
Rudy's Challenge - 25 points
Score 450 or more in the Rudy's Revenge Challenge
Same as the last one, but with 450 fruit. You need to be a little bit tighter with the collecting, but this should come easily.
Dino Fighter Pilot - 25 points
Score 700 or more in the Flight of the Pterodactyl Challenge
You need to get 700 or more on this one. Shoot EVERYTHING. IF IT MOVES, SHOOT IT. IF IT DOESN'T MOVE, SHOOT IT ANYWAY. this one's fairly hard but you should be able to get it in a few tries
Quiet Time - 25 points
Score 700 or more in the Noisy Nightlife Challenge
You need to hit 700 again, but this is ridiculously easy. Shoot at the huge dinosaurs to rack up tons of points. You should get at least 1000 your first try.
Pterodactyl Assault - 25 points
Complete Saving Sid Challenge in under 2 minutes 50 seconds
This challenge is another timed one. You need to complete all three objectives in under two minutes and fifty seconds. The objectives are to kill 25 dinosaurs, kill 10 plants, and fly through ten smoke rings. Go for the smoke rings first but make sure you're shooting at the other things as you do it. Some of the plants are fairly tricky to find, so you may need to take a few tries to memorize where the plants are, but then you'll have it.
Cyan Crystal Collector - 25 points
Collect all 16 Cyan Crystals
Purple Crystal Collector - 25 points
Collect all 16 Purple Crystals
Amber Crystal Collector - 25 points
Collect all 16 Amber Crystals
Red Crystal Collector - 25 points
Collect all 16 Red Crystals
Blue Crystal Collector - 25 points
Collect all 16 Blue Crystals
Dedicated Collector - 90 points
Collect all 5 sets of 16 crystals
The Early Bird - 15 points
Complete Sid's Early Start
Baby Proofer - 15 points
Complete Baby Proofing
Pursuit - 15 points
Complete The Pursuit
Egg Hunt - 15 points
Complete Lonesome Sloth
Egbert, Shelly and Yoko - 15 points
Complete Egg Roll
Escape! - 15 points
Complete Run Sid Run!
A Nutty Rival - 15 points
Complete Nuts About Scratte
Meeting Buck - 15 points
Complete Buck to the Rescue
Keen Gardener - 15 points
Complete Flower Power
Rescue Operation - 15 points
Complete Root of all Evil
Helping Scratte - 15 points
Complete Scrat's Jungle Jive
Always follow the Rules! - 15 points
Complete Expect the Unexpected!
Protect the Babies - 15 points
Complete Noisy Nightlife
Ace Shooter - 15 points
Complete Flight of the Pterodactyl
Pterosaur Troubles - 15 points
Complete Saving Sid
Rescue Sid - 15 points
Complete Rudy's Revenge
In Love - 15 points
Complete Scrat's Tar Pit Trouble
A Sticky Situation - 15 points
Complete Grave Danger
Final Showdown - 15 points
Complete Skeleton Bridge
A Chilled Breeze - 50 points
Complete the Ice Age Levels
Escaping from the Unknown - 50 points
Complete the levels below the Ice
Going Home - 90 points
Complete the Game
The Development Team - 10 points
View the Credits
Diego's Challenge - 25 points
Complete Diego's Challenge in under 45 seconds
Rescue Egbert - 25 points
Complete Egg Roll Challenge 1 in under 40 seconds
Rescue Shelly - 25 points
Complete Egg Roll Challenge 2 in under 1 minute 15 seconds
Rescue Yoko - 25 points
Complete Egg Roll Challenge 3 in under 1 minute 45 seconds
Scrat's Time Challenge 1 - 25 points
Complete Nuts About Scratte Challenge in under 1 minute
Scrat's Time Challenge 2 - 25 points
Complete Scrat's Jungle Jive Challenge in under 2 minutes 15 seconds
Scrat's Time Challenge 3 - 25 points
Complete Scrat's Tar Pit Trouble Challenge in under 2 minutes
Pterodactyl Assault - 25 points
Complete Saving Sid Challenge in under 2 minutes 50 seconds
Momma's Challenge - 25 points
Score 350 or more in the Run Sid Run! Challenge
Quiet Time - 25 points
Score 700 or more in the Noisy Nightlife Challenge
Dino Fighter Pilot - 25 points
Score 700 or more in the Flight of the Pterodactyl Challenge
Rudy's Challenge - 25 points
Score 450 or more in the Rudy's Revenge Challenge