The original game is 10x better, parts and even biomes are locked behind clunky base building that is somehow worse than the original game's base building. Not to mention the reactor system.

Definitely still a huge WIP, but I'm really interested to see the direction they go with this game. I understand it is a "spiritual successor" but they're still pulling a lot from the old game into this new one. While I have yet to get super far into the Early Access , I still want to see this game grow. I'm really excited about seeing a new take from the previous sandbox mode.

pros:

• New biomes and interesting landscapes make the world feel way more "alive" than the previous game. Something about seeing the same rolling rounded hills of the first game was largely a turn off, which they made up for in combat. This game expands on the environment with dangerous flora and different artificial threats that are scattered around the map. Being aware of your surroundings is necessary for survival as I feel much more engaged with the game and resources.
  
  
• New "restrictive" blocks and reactor efficiency makes ship-building way more exciting. Some people hate the change but I absolutely love it. Being able to make monstrous dreadnaughts without much progression was a major pullback for me in the first game. This game, however, makes you aware of each specific block you place and how it functions. Instead of having a huge storage to store every single item you come across like in the first game, you must now physically build storage onto your ship and base to keep track of each item.
  
  
• New "repair" function makes fights more interesting than just blasting away at everything in sight. Since most larger vehicles will have a chance to repair, you'll need to either be stocked with an insane amount of ammo to keep blasting through armor or be tactical about your approach to heavily defended enemies.
  
  
• New graphics are very pretty :D
  
  
• Plenty of new mechanics to keep things spiced up. I haven't dipped too deep into it yet, but I'll likely update my review when I get further in.

cons:

• Vehicle and enemy variation is pulling from a very small group right now. You'll find maybe 5-10 different types of vehicles in specific biomes. Fights become repeated, and the fighting is unique but gets old when there's no real challenge.
  
  
• AI hasn't seemed too change much, but now that they have a repair ability it becomes a little more like phases. They still run into objects senselessly a lot and get themselves blown up, but it's still decent enough to make fights partially strategic.
  
  
• No real story right now. Making a game and creating a sense of difficulty through limitation should really have a reason to commit to the challenge of exploring and finding new things, not to find a new resource and launch it to space for the 50th time. I'm really hoping to see them add story-driven missions in following updates.
  
  
• AFAIK there is no teleportation or way to transport your base without physically moving every item super far distances. I'm not sure if there's a faster way (flying) or if it was intended to build outposts as you go further into the world, but it feels like I'm leaving things behind a lot. It would be nice to have a set way to either quick travel to another spot or at least access storage from earlier bases in newer outposts.
  (This isn't so much a con as a suggestion tho so :d)

Obviously this is all subject to change as the devs work out the complete direction and progression for their game ^^

Terratech Worlds is a big step up from the original, it has new features and hazards as well as a completely rebuilt crafting system. Although you now have flora hazards, as long as you keep an eye out and shoot from afar, you'll be fine.

A lot of reviews talk about how annoying consumable ammo is, however although you can go through a lot of ammo, it is very cheap (1 Carbon and 1 Aluminium for 10) and quick to produce, not to mention that mining is much better once you have a fragmentor.

Worlds isn't without problem though. The graphics despite being good, are very GPU taxing. With an NVIDIA GeForce RTX 3050 Ti you can get a solid 50 fps on minimum settings if you don't move your camera much, however it often drops down to 10-15 fps during fights or when exploring new terrain. On top of this, venturing too far into enemy territory without picking off enemies from the border will quickly find you surrounded by 4+ techs who will target you first. Paired with the GPU limitations, it is practically impossible to win a fight like that.

All in all, I suggest to anyone interested in this game to buy it when its on a good sale, or when they fix the rendering engine and balance enemy spawning.

Ratings:
Environment - 9/10
Enemies - 4/10
Graphics - 9/10
Gameplay - 7/10
Performance - 1.5/10
Overall - 6.1/10