SteamWorld Dig
SteamWorld Dig is a perfect mix of mining, exploration and upgrading. The controls are great, exploring is fun and the dialogue is well written. It feels perfectly crafted and is one of the only games in my 300+ collection that I've completed 4 times. The sequel is even better and improves on it in every way.
Pros
- Lots of upgrades which aren't far apart
- Movement abilities to get around the mine such as steam jump, sprinting
- The controls and movement physics are great
- There's a clear progression path
- Lots of optional side caves with hand crafted puzzles
Cons
- Teleporters cost Cores, which are a non-renewable resource
- The pacing slows right down when you reach mine 3