For those who do not know, TemTem is like Pokemon in a sense but more in-depth battle mechanics. I got the game from Humble Bundle 30% off and here's my impression with the game itself:
If you are a fan of Pokemon, (most recent Pokemon Sword/Shield) then this is a Pokemon clone, no doubt about it, from the way you catch, through how you heal, to how you even get a gift monster from the professor in your home town... But it's looking like a fantastic little Pokemon clone, & something I think I'll end up sinking many, many hours into over time. It's really nice creating your own avatar when you start up & makes each player character look very individual. (and yes, it's already a thing in Pokemon now, but it needs more creative avatars) The monsters, some really cool one's, some not so cool one's, so just like Pokemon on that front, the game even has a few monsters it could use as a Pikachu type mascot.
The battles I enjoy more than Pokemon, strategy is more involved, & the stamina system is a much better way of handling moves & stamina than the PP system ever was. A monster always knows all its moves it's ever learnt, but can only use 4 at a time, doesn't "forget" them like Pokemon. The levels you evolve your monsters at is also differently handled to how Pokemon does it, with it being relevant to when you catch the monster, so for example, the "Pidgey" type monster on the first route evolves 7 (I think) levels after you catch him, so if caught at level 2, evolves at 9, but if caught at level 14, evolves at 23. There are "shiny" TemTem called Luma, with a 1/6000 chance of spawning. You can also see the equivalent of EVs when catching, which is fantastic & makes hunting for a better monster fun. TemTem isn't exactly MMO, well not yet at the slightest, it's mostly co-op for the time being. It's a shared world with the prospect of becoming an MMO when the game is finished.
And now, for the cons: This is an Early Access, server issues are mainly sorted but still pop up from time to time, and it cost $35, it's a bit much for an Early Access, this should have been free-2-play with Microtransactions for cosmetic stuff like other games. Final verdict: It's I'd say if you like and enjoy Pokemon handheld games, it's worth checking it out, it's already a good game & has potential to be amazing in due time. If you're on the fence, wait out Early Access & see how the game evolves. (Just like Warframe did)
Also, Digital Foundry did their take on TemTem: