*Demeter's Grace - "Collect 100 resources of any kind with Demeter's Obelisk!"
This is most easily done on level 3.4 or 3.5. You choose. Personally I would just recommend doing it on level 3.5 because it will happen naturally by doing the "Croesus" achievement.

*Croesus - "Collect 100 golds" (it's actually 100 gold in just 1 level, not in total)
Best level for this is 3.5 (it's a requirement to beat the level anyways). Get all the gold mines and Demeter's Obelisk, and do the least amount of harpies as you can until hit the 100 gold.

*Road worker - "Remove 4 obstacles using the 'Work Faster!' bonus!"
Pick a level that has the "Work Faster" bonus on the right hand side of the screen with the energy bar. Make sure you have enough resources to clear 4 different obstacles within a short window. Activate the bonus, and then quickly clear 4 objects.

*Hunter - "Shoot 10 flying birds on a single level!"
This one is a bit silly. While you're playing a level, if you're really paying attention to it, you will notice there are tiny birds that are flying around your screen in and out. Just rapidly click on them when you see them until they explode. Do that 10 times in the same level.

*Puzzler - "Find 5 puzzle pieces!"
Puzzle pieces are randomly hid throughout levels. There is 1 in every level. Check out the guide listed under the game guides called "Puzzle Piece Locations." There is 1 guide there with all the locations for them, and it's pretty accurate.

*Longbowman - "Stop all aerial attacks on a single level within 3 seconds!"
This is done on level 2.10 where Hercules has to play some drums while shooting thieves and birds with a bow. Just shoot the birds really fast.

*Speedster - "Activate the 'Run Faster!' bonus with a complete Hermes' Obelisk!"
Some levels have obelisks in them that are broken that you can choose to repair. You minds well always repair them anyways, because hey it's a free constant bonus. So pick a level with Hermes' Obelisk in it, that also has the "Run Faster" bonus on the right side of the screen. Repair the obelisk. Then use the "Run Faster" bonus.

*Anti-theft Speed - "Prevent thief from stealing resources during a single level!"
There really isn't much difference between this achievement and "Autolycus." Just gather a resource at the same time that a thief is heading to it, but faster.

*Autolycus - "Outsmart a thief by stealing something from him - right from under his nose!"
This one is a bit tricky. You have to gather a resource just as a thief is heading to go steal it. The thief will kind of *sigh* as he gets to the empty resource area and will leave. This will naturally happen as you play through the game and get more servants and more economy-based buildings.

*Double bonus - "Use 2 different bonuses together."
This means that the bonuses on the right hand side of the screen must be used during the same time frame, and it cannot be the same bonus used twice, that is for the "Persistence" achievement. Pick a level that has 2 different bonuses that are fairly inexpensive to use. (You can tell how expensive the skill is to use by how high or low it is on the gauge). Let your energy fill up to the top, and then click both bonuses quickly. Easiest level in my opinion was 3.7. There are 3 bonuses there, and all are cheap to use. Let your energy bar get full and you an use all 3 at once.

*Persistence - "Use the same bonus again before its time runs out."
NOTE: This is the opposite of "Double Bonus."
During a level, let your bonus bar on the right hand side fill all the way up. Then when it's full use a skill that requires only a small amount of it's energy, and use the same bonus again as quickly as possible. For me I did the movement speed bonus, and soon after was able to use it again.

*Juggler - "Call upon 3 different characters simultaneously."
Not too difficult to accomplish. It will happen naturally as you play throughout the levels. Everybody counts as a character. Servants, Hercules, Medusa, Pegasus etc. Just have 3 of them do something at the same time. Like 3 servants gathering something or building something.

*Commander - "Call upon 5 characters."
This is the same thing as "Juggler." This will almost naturally happen in the later levels anyways if you operate quickly. If not, just pick a level that has several characters besides servants and Hercules. Something like Medusa and Pegasus same level. Get your economy up and running and don't do any actions that require your special character to do something. When the only stuff left requires you to use an action (like Medusa scaring a minotaur and Hercules needing to move a bolder), do all the actions at the same time, as well as have your servants queued up to collect resources.

*Strategist - "Complete a level in Gold time without using any bonuses."
This one is pretty straight forward. Your bonuses are on the right hand side of the screen during a level. It's things like servants move faster and stuff. The bar to use skills slowly refills over time. To get this achievement, simply don't use any of those bonuses for 1 whole level.

*Trickster - "Servant must collect one resource once all objectives have been met."
You can queue up actions for your servants to do in a long line up to 3 actions queued. So as you are nearing the end of the level with just 1 objective left, queue up a bunch of actions to have resources gathered right after the queue to have the objective completed. Don't try too hard to get this objective, it will basically happen guaranteed at some point while working on other things.

*First Gold - "Complete 3 levels in Gold time."
"Gold time refers to how quickly you do a level. On the left hand side of the screen you'll see an arrow during each level. The top half of the arrow is gold colored, the bottom half is silver colored. Just beat levels above that gold tipped arrow portion. It's not difficult at all to do this. Just be efficient and quick. Work on economy of things that create resources before objectives to make objectives come faster.

*The Golden Mean - "Complete 20 levels in Gold time!"
This is the same as "First Gold" except you have to do 20 levels.

*Gold Chain - "Complete all levels in Gold time!"
This is the same as the above prior 2.

*Superior - "Beat a Developer's Record!"
This can be semi difficult for some people. It requires you to gather more resources and beat the level in a faster time than the dev's originally did... and they have pretty good scores. You can see their score at the end of the level after you complete it. If you just do all the levels first before you try to do this achievement, chances are you will probably beat them at least once. If not, pick a level that you had a score really close to them, and keep playing it more efficiently as far as gathering and time goes unti you beat them.

*Overlord - "Beat a Developer's Record 10 times!"
By far the hardest achievement. Just find 10 levels that you accel at, and just play them over and over doing it as quickly and efficently as possible until you beat the developer. You must do this on the medium or hardest difficulty. If you beat the developer on the medium difficulty then master the hard difficulty on the same level. That level will count as 2 then.

*Excellence - "Complete all mini-games perfectly!"
The mini games are the final levels for each sections where Hercules has a health/energy bar on the bottom of the screen that starts off green. In order to get this achievement, that bar just needs to stay green in each level. Level examples include but not limited to levels such as the water pipe maze, and the bird/thief shooting levels.

*Champion of Champions - "Earn every achievement!"
Self explanatory, you'll get this by getting everything else.