Dev Activity: 91 commits (30 days)
Attraction: uniqueness, excellent ui/ux, live racing.
2. EOS Knights www.eosknights.io
Dev Activity: 188 commits (30 days)
Attraction: mobile first approach, game mechanics, impressive user growth
3. Axie Infinity www.axieinfinity.com
Dev Activity: 25 commits (30 days)
Attraction: art style, community, immersive world
4. Gods Unchained www.godsunchained.com
Dev Activity: 3 commits (30 days)
Attraction: active user growth, esport tournament, multiplayer competitive
5. MyCryptoHero www.mycryptoheroes.net
Dev Activity: 'nil' commits (30 days)
Attraction: rpg, pixel art, zelda style
List: 1st Feb 2019
A curated selection via www.stateofthedapps.com/rankings/category/games?
I would not limit myself to only five of these games, since at present there are more and more choices. Before investing in any of them, I would consider other options too, and of course, read reviews. For example, you can do it here - crypto games. But I would rather read reviews on various platforms to get the most complete information.