Is there any chance you'll either include more skins for the dinosaurs or perhaps include a way to obtain the challenge mode skins without beating challenge mode? I desperately want the wetland tyrannosaur skin but I cannot beat the Jurassic difficulty.
I know this is off topic, but don't be threatened by challenge mode, Jurassic Difficulty. There is no time limit, and with proper dinosaur and money management it isn't that bad. I personally completed mine in under four hours (going for the fast for a biped achievement). Honestly Isla Pena is one of the easiest if you follow a few tips.
1. Contracts, contracts, contracts.
In this game, contracts generally suck! I tend to restart my challenge mode until I get a series of easy to complete contracts like, obtain a fossil, Incubate a dinosaur, build an expedition center, etc. Next, don't be afraid of canceling bad contracts, or if you really want to complete it without much difficulty, saving before ever accepting a contract, and loading if the contract is bad. This ensures you get cash from contracts.
Another tip to try out is the contract to build emergency shelters. After building one, I always sell it resulting in increased profit, and I always get that contract back in the pool.
2. Dinosaurs
Never ever ever incubate or go for any dinosaur that likes to break out. Dinosaurs like Velociraptor, Baryonyx or any large carnivore are not worth it (unless you have Dr wu DLC). Instead, focus on dino's that are easy to keep and maintain. Keep your ceratosaurs, your iguanodon, and other easy dinosaurs. Last, I go saurapod heavy. They are easy to keep, have huge social and population limits, and provide a lot of points.
3. Building.
There are a lot of unneeded buildings in the game. Try and avoid building anything more than you absolutely need. In my case, for Pena, I build a single viewing platform (one brings in the cash, others are unneeded) with a corresponding clothes shop, restaurant, hotel, and arcade. This keeps my guests happy without draining my power. Space management can be key to dino diversity.
Here are some links to helpful tips that should help you through and will include more info than I have provided:
Any tips on the best dinos and enclosures to make it through Pena on Jurassic? I had to restart a ton of times. Storms decimate my park constantly and I can’t seem to figure out the best dinos to group together to get my rating up. How did you guys do it? What dinos did you use and avoid? I...
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Source: https://www.youtube.com/watch?v=zd5fJnZ379c