Zoo Tycoon: Ultimate Animal Collection

Edit for clarification. This achievement is unlocked in the Campaign Mode. I recommend playing at least some of the Challenge Mode so you are familiar with the controls/gameplay mechanics. My guides for all the Campaign achievements will just list what to do, not how to do it.

Start the very first Campaign. From the Main Menu, choose Single Player > New Game > Campaign Mode > Original Campaign. You should default to Troubled Zoos - Cambridgeshire Animal Park (if not, use to find it).

Should be very simple as this is little more than a tutorial scenario. Follow the steps listed and it will only take 5-10 minutes.

Adopt another 2 West African Giraffes in Savannah Large and put in appropriate exhibit items,
Research Janitor’s Office,
Fix the Exhibit items in Tropical Medium for Elephants – you will need to sell one of the interactions and replace it with an activity centre enrichment,
Hire one level 3 Zoo Keeper,
Build a Rest Room and upgrade to level 2,
Build a Tropical Small exhibit, equip it for Lions and adopt 2 x Asiatic Lions
Build a Janitors Office and staff it with 1 x level 3 Janitor,
Upgrade the Deco Plaza, Burger Barn, Lion Mascot, Animal Totem Statue and Medium Lake to level 2,
Just wait it out or upgrade the Zoo Keeper Centre and Janitor Office to hit Fame Level 7 and finish.