Thought I'd post in here again to state that I'm still playing this game on a regular basis.
The game has adopted a Seasons model with the collectible tribe eggs (this game's version of a loot crate, what you get in the egg is random and you can get duplicates), and I think the developers of this mobile game are doing a good job at making great Lemming designs. It's well worth a look if you're looking for inspiration for new tilesets because we're getting to the stage where we are getting Lemmings whom look like Eurovision contest winners "Lordi" and Punk Lemmings with mohawks
I made this list of the tribes which exist so far, I am able to see the tribes from Seasons 1 and 5 but not the ones from Seasons 2-4 because the game messed up with telling me there was an update until recently, by the time I had updated I had missed Seasons 2, 3 and 4 and there is no way to obtain them. If anyone who is still playing has any information about the tribes from these seasons, it would be helpful
Season 1: Beach, Space, Medieval, Polar, Prehistoric, Highland
Season 2: Lunar, Aquatic, Fast Food, Starstruck, Pigskin, Island, Heartbreakers, Sweet Shop
Season 3: Museum, Craic, Gem, Carnival, Spring, Holi, Sushi
Season 4: Eggheads, Heroes, Lionheart, Faeries, Science, Hip Hop, Circus, Weather
Season 5 (current): Safari, Euro Stars, Nautical, Raceway, Punk, Robot, Norse, Half Baked
There are also regular Tournaments on this game, you compete against 9 other players and try to save more Lemmings than them over a 3 day period (sadly Double Lemming multipliers or Lemmings given as rewards for watching ads don't count towards your total, they have to be actually saved on a level to count). You have to get in the top 3 to get promoted to the next tier usually, it can be top 2 in the higher tiers, if you get 9th or 10th you will go down a tier though
.
The tiers are named after the difficulty ranks but only Fun and Tricky exist at the moment, hopefully a Taxing and Mayhem league exist soon. There are 5 tiers within the difficulty leagues. You start out in Fun Tier 1, if you get promoted you will go up to Fun Tier 2 and so on up to Tier 5. After Fun Tier 5, you go up to Tricky Tier 1 and so on.
It's quite addictive because it keeps you coming back to save the most Lemmings but sadly those who pay to play this game will have a massive advantage here, it's still fun to try and beat the paying customers and I'm currently in Fun Tier 4!