Loom Network is a blockchain optimized specifically for high-performance Dapps. Loom dapps are able to offer a UX comparable to traditional games and web applications, and onboard new users without the friction of needing to download crypto wallet software.
DPoS networks usually are around 20-100 validators, to keep the network performant. There are also Delegators that can proxy their stake to validators.
Plasma Chain is a central hub for token transactions, linked to Ethereum by Plasma Cash. Check out this post:
Zombie Battleground and CryptoZombies are free, and can be downloaded here: https://cryptozombies.io/
For battlegrounds you need early access key i think, only early backers got them as for now I believe. They cannot be found in the App store and it's currently in alpha stage. To access, you need a tester key; if you want one you have to buy some packs on loom.games or...you can ask for one on our discord server: https://discord.gg/jaRhVSB