NOTE: The Secondary Objectives will not register for the achievement unless you finish the level. DO NOT QUIT before that.
Also, if you replay a level that you are missing a collectible in, the counter will restart and you will have to collect all the collectables for that level again.
There are 1-2 secondary objectives for 9 out of 10 levels. Chicken Fight level has no secondary objective. They are pretty easy to complete, the levels are streamlined enough that you just need to do a bit of looking around to find the objectives which are just level specific collectibles.
Note that you must complete a full objective for it to save. Getting 6/10 and finishing the level will not count and when you come back to the level you will have to collect them all again. You do not need to do both secondaries at once for them to count. You can complete one and come back later and do the other and it will still count. On the flip side, if you're missing one or two and you're at the final boss fight, you can press start and go restart level and you will be at the start of the l
#6 You don't knock pirates off the ship to do this. While fighting off the pirate ships look out to the water and every now and then you will see a wooden cage with a guy in it and a couple sharks circling around. Use a cannon to destroy. Don't worry about missing because it seemed like they kept coming through out the battle. Just be careful not to end the sequence before you get 3.
Secondary Objectives on "It's All Greek To Me - Front porch of yellow house next to Mort's - Front porch of blue house where Mort is standing (house you ended at after getting the photo of Lisa) - At grey house next door - On table in back of the next house - On table in front of the same house - On table in island in the road - Shoot the propane tank by the fence in back of house next to the sorority - On ground in back of same house - On table in front of same house - On porch of same house near the last one - On a table immediately after you steal the tap (Talk with Mort to open next house) - Next to Meg on front porch of Jock house - On side of same house next to passed out Greeks - On table in back of same house (Talk wi
Secondary Objectives for "Santa's Sweatshop" 1-Advent calender 1 across from the main entrance to the factory 2-Rubert 1 in a present box outside the main entrance to the factory. 3-Advent calender 2 to the right of the Vernon picture. 4-Advent calender 3 on the left of the door to the factory. 5-Rubert 2 is behind the fire where the mail is. 6-Rubert 3 is on the left of the asians on top of the yellow crates 7-Advent calender 4 is on the left of rubert 3 under the stairs. 8-Rubert 4 is in a present box after the conveyer belt part. 9-Advent calender 5 is on the right of rubert 4 10-Advent calender 6 in between the two fans. 11-Advent calender 7 on the left before you go on the elevator. 12-Rubert 5 is on a barrier and can be see when your on the elevator. 13-Advent calender 8
13-Advent calender 8 is on the left after the part with the 3 fans and gears 14-Advent calender 9 is right after you get off the conveyer belt with exploding elves. 15-Rubert 6 is in a present box right outside the door that leads to the room with the fountain. 16-Advent calender 10 is hidden in a stack of present boxes to the left of santas aoffice door 17-Rubert 7 there is a light post on the left of santas office door.Jump on it,then jump on the gear and then run and jump and the brown thing connecting them to grab him. 18-Advent calender 11 is behind the reindeer fountain 19-Advent calender 12 is behind santas office.It can seen when santas talking in the cutscene. 20-Rubert 8 just look on every chair in santas office.