Here is the complete version history for Rodeo Stampede for iOS. Android version history varies slightly, although it is largely the same.
1.22 - Chinese New Year Event and Great Wall
1.22.0 - 28 Jan 2019
- New Map Available: Travel to China and Stampede across the Great Wall!
- 5 New Animal Species to find including Dragons, Pandas, Monkeys, Cranes, and Horses!
- It's the Year of the Pig: Celebrate with Chinese New Year Zoo decorations and a time limited event: collect lanterns in the stampede to redeem for new animals and hats.
- Changes to revive: player now always transported backwards rather than forward once they revive.
1.21 - Winter Holiday Event 2018
1.21.1 - 11 Jan 2019
- No changes
1.21.0 - 12 Dec 2018
- Travel to the North Pole and Ride Santa's Reindeer in this limited time holiday themed map!
- Collect presents to exchange for exclusive content including new animals and hats!
1.20 - Halloween Event 2018
1.20.2 - 16 Nov 2018
- Bug Fixes
1.20.1 - 9 Nov 2018
- Bug Fixes
1.20.0 - 24 Oct 2018
- Something ghoulish and mysterious is happening in the Stampede and Zoo! (Halloween Event 2018)
- Find and capture ghosts in the Stampede to collect limited time outfits and animals.
1.19 - Character Customisation, Dimetrodons, Lucky Lamb
1.19.2 - 10 Sep 2018
- Bug Fixes
1.19.1 - 27 Aug 2018
- Bug Fixes
1.19.0 - 16 Aug 2018
- New Shop UI
- New IAP: Increase Rare Animal Sightings with the Lucky Lamb
- 1 New Dinosaur added to the Jurassic Zone (Dimetrodons)
- Players can now customise their characters!
1.18 - 2nd Anniversary Event
1.18.0 - 21 Jun 2018
- The 2 Year Anniversary update is here! Collect presents to unlock new limited-time hats and animals.
1.17 - Children's Day Event
1.17.1 - 25 May 2018
- Children's Festival Update
- Learn More about our recent Children's Festival Update here!
1.17.0 - 24 May 2018
- The Children's Festival is here, play each day to get new animals and outfits!
1.16 - Garden Expansion
1.16.1 - 14 May 2018
- Fixed Garden Bug, can now catch new critters deep in the Garden zone
1.16.0 - 10 May 2018
- Three new animals added to the garden zone!
- These animals did not appear in the stampede due to a bug
- 9 new hats to collect!
1.15 - Garden
1.15.1 - 19 Apr 2018
- Bug Fixes
- 2018 Chinese New Year Event baby animals released
1.15.0 - 22 Mar 2018
- Shrink down to enter the newest Rodeo Stampede Map: the Insect World (Garden)
- 5 New Species Crawling and Flying Critters to Catch
- 15 New Hats to Unlock
- Major spelling corrections
1.14 - Chinese New Year Event 2018
1.14.1 - 13 Feb 2018
- Bug Fixes
1.14.0 - 8 Feb 2018
- Enjoy New Chinese New Year Themed Decorations for the Zoo
- Collect Red Lanterns to Trade in for Chinese Themed Hats and Animals
1.13 - Winter Holiday Event 2017
1.13.1 - 15 Jan 2018
- Bug Fixes
1.13.0 - 14 Dec 2017
- Travel to the North Pole to ride on Reindeer and collect presents
- Trade in presents for new Christmas themed animals, hats and costumes
- New Decorations available for your zoo
- Parks released; the player can now change the theme of their Sky Zoo.
1.12 - Halloween Event 2017
1.12.1 - 14 Nov 2017
- Bug Fixes
- Some animals' names got corrected
1.12.0 - 27 Oct 2017
- New Halloween Game Mode
- New Halloween Themed Animals and Hats to Unlock
- Animals come out even more slowly in zoo
1.11 - Olympus Expansion
1.11.0 - 17 Sep 2017
- 24 New Mythological Animals to Catch
- 3 New Mount Olympus Areas to Explore (Olympus 4, Olympus 5, Olympus 6)
1.10 - Olympus
1.10.1 - 24 Aug 2017
- Bug Fixes and Improvements
1.10.0 - 18 Aug 2017
- Explore the New Mount Olympus Zone
- 40 New Mythological Species to Befriend in the Stampede
- 15 New Hats to Unlock and Collect
1.9 - 1st Anniversary
1.9.3 - 4 Aug 2017
- Bug Fixes
1.9.2 - 27 Jul 2017
- Bug Fixes
1.9.1 - 11 Jul 2017
- Bug Fixes
1.9.0 - 22 Jun 2017
- It's our 1 Year Anniversary - A Big Thank You to all our players for your support! Collect anniversary presents in the stampede to exchange for special rewards
- Winter Holiday and Chinese New Year Event hats re-released
- Stegosauruses released
1.8 - Jurassic and Space Zoo
1.8.2 - 27 May 2017
- Bug Fixes
1.8.1 - 24 May 2017
- Bug Fixes
1.8.0 - 18 May 2017
- Bring on the Dinosaurs; travel through time and space to enter the new Jurassic World!
- Develop your new space zoo to hold your pre-historic animal friends!
- Avoid new obstacles, such as the predatory T-Rex and volcanic rocks.
- Catch and breed 56 new dinosaurs!
- Chinese New Year exclusive animals reclassified to endangered.
1.7 - Endangered Species/Animal of the Day
1.7.2 - 25 Apr 2017
- Bug Fixes
1.7.1 - 19 Apr 2017
- Bug Fixes
- Endangered animal babies' abilities changed
1.7.0 - 23 Mar 2017
- New Daily Challenge for a Limited Time Introduced: Endangered Species Quests
- 26 new animals to capture and breed
- Bonus coins for animals now increase based on the island unlocked
- Hints and tips released for Mountains, Outback and Tundra
- Jungle redesigned
- Hippos now found at 0m
1.6 - Breeding System
1.6.0 - 8 Feb 2017
- Brand New Breeding System
- Over 250 animal babies to collect
- Baby animals will follow you in the stampede, providing small boosts
- Chinese New Year Content Removed
- Boss animals now able to be found in the stampede once initially befriended
1.5 - Tundra and Chinese New Year Event
1.5.0 - 25 Jan 2017
- New Tundra Zone to explore
- Over 50 animals to befriend and add to your Sky Zoo
- Awesome Chinese New Year themed map, animals, and hats
- Time Limited Chinese New Year themed challenges
- Over 25 hats to unlock and collect
- Bug Fixes and improvements
- Increased earnings for bonus coins earned when riding animals from Jungle and higher
- Toucans and flying foxes now appear in front of the player rather than catching up from behind and hovering just in front of the player
1.4 - Winter Holiday Event 2016 and Revive Raven
1.4.1 - 11 Jan 2017
- Bug Fixes
1.4.0 - 14 Dec 2016
- Travel to the North Pole and ride on Santa's Reindeer in a limited-time holiday themed event!
- 6 New limited-time Winter Holiday Themed hats to unlock!
- Festive Holiday decorations for your Zoo
- The Revive Raven is available for purchase granting free revives!
- A physical shop is now in the zoo!
- Bug Fixes and improvements
- Crates are now worth the same amount regardless of which map you are in, but still increase as you unlock new maps
- Cash Cow and Mission Mule relocated to Epic Habitat
1.3 - Outback and Halloween Event 2016
1.3.4 - 23 Nov 2016
- Secondary Cloud Download for New Zones
- Bug Fixes
1.3.3 - 4 Nov 2016
- Secondary Cloud Download for New Zones
- Bug Fixes
1.3.2 - 26 Oct 2016
- Bug Fixes
1.3.1 - 20 Oct 2016
- Halloween Update
- 4 Spooky New Animals
- Halloween Themed Zones and Zoo
- Secondary Cloud Download for New Zones
- Mountain renamed to "Mountains"
1.3.0 - 13 Oct 2016
- New Outback Zone
- 49 New Animals To Find and Befriend
- 21 New Hats to Collect
- Bug Fixes
1.2 - Level 9 Animals, Hats, Stickers and Mission Mule
1.2.2 - 29 Sep 2016
- Bug Fixes
1.2.1 - 12 Sep 2016
- Stickers
- Bug Fixes
1.2.0 - 8 Sep 2016
- New Skin for all animals in the Savannah, Jungle and Mountains
- Hat System: Over 60 hats & costumes to collect!
- New IAP: Mission Mule
- Jellephant released in 2nd Monthiversary
1.1 - Mountains
1.1.2 - 15 Aug 2016
- Made Mountain Easier
- Coin Pack Purchases now Increase Based on Zoo Income (The Higher Your Zoo Income, the More Coins are available in Store)
- Optimised Localisations for East Asian Languages
- Bug Fixes
1.1.1 - 3 Aug 2016
- Fixed iCloud problems
1.1.0 - 26 Jul 2016
- Brand New Mountain Environment
- 42 New Animals to Befriend in the Stampede
- Expanded Sky Zoo to Fit New Mountain Animals
- New Music for the Jungle
1.0 - Release
1.0.1 - 5 Jul 2016
- Balance tweaks to the Jungle zone to make alligators less deadly.
- Bug fixes.
1.0.0 - 22 Jun 2016
- Release of Rodeo Stampede: Sky Zoo Safari