-Estimated achievement difficulty: 4/10
-Offline: 43 (1000)
-Online: 0 (0)
-Approximate amount of time to 1000: 18+ hours
-Minimum number of playthroughs needed: 2
-Number of missable achievements: 21
-Do cheat codes disable achievements? N/A
-Does difficulty affect achievements? Yes
-Glitchy achievements: None
-Unobtainable achievements: None
-Extra equipment needed: None
Welcome to G-Force! This game is a Disney channel movie game so like always, get ready for some collectibles! This game will require a bit of time and effort but shouldn't be terribly hard for anybody. You need at least two playthroughs because of the Distinguished Service Medal achievement and your playthrough on Special Agent difficulty.
Step 1: Story Mode
In this playthrough you will play on easy and should be trying to gain all of the collection achievements as well as the combat achievements. Try to collect as many chips as you can by destroying everything that you can in each room before moving on. If any vents or chips are unreachable by Darwin you can always send Mooch into them. This will help you gain the travelling achievements for both Mooch and Darwin, and you will need nearly all of the chips in the game to unlock all of the upgrading and purchasing achievements. Try to use all of the available save slots if you're going for 100% completion, so that way if you end up coming short on chips at the end of the game you wont have to start a new game. A guide for the collectibles can be found here.
Step 2: Second Playthrough
After completing the game for the first time you will unlock Special Agent difficulty which is needed to unlock the G-Force Special Agent achievement. Now you should have some sort of idea on what to do in each level so this is the playthrough where you need to try to complete it in less than eight hours. Don't go out of your way for collectibles and chips during this playthrough. Spend your chips at the kiosks whenever one pops up, and I recommend buying a map at the beginning of each level because on this difficulty the only way to find your objective is by looking at the map. Save at every checkpoint, same as you did on the first playthrough, and if you think you're wasting too much time just load your save.
The game isnt too bad of a game and if you put the time in it's not too hard to get the full 1000. Congratulations on your 1000 in G-Force!
[x360a would like to thank Foxxy kyle for this roadmap]