Terraria - This classic title has been around for a very long time. It's a game about exploration, base building, and adventuring in a sand box world filled with bosses. I haven't played much of Terraria, but if I remembered correctly, there are various classes you can choose to build your character into, such as a summoner, wizard, melee/dps, etc.. Another game with a similar element of play, but focusing more... Source: over 1 year ago

There's also something like Terraria and Starbound if you enjoy going on adventures with a bit of a RPG element as well as building. Source: over 1 year ago

Starbound has one of the best soundtracks of any video game I've played. Source: over 1 year ago

Starbound: Includes a race called The Glitch, a medieval society of robots created by persons unknown in an experiment to understand how societies form. I'm not actually sure if the post-beta builds did anything with that lore, but nevertheless you can play as one and find settlements of them out in space. Source: almost 2 years ago

Terraria and Starbound (also great titles to play) is a pixel RPG adventure with build elements. Most of it is focused on the adventure/RPG with the building being a minor element to the game. Source: almost 2 years ago

Dungeon Crawl: Stone Soup. Free roguelike with lots of options, but uncomplicated. You can run it on just about anything. Source: almost 2 years ago

Also, Dungeon Crawl Stone Soup is a decent pick. It's free, so hard to beat the price. There's also no music or audio at all, which means I can listen to my own music or a podcast while I rampage through the dungeon as a Troll Berzerker, pulling apart goblins like they're made of monkey bread. Source: about 2 years ago

Dungeon Crawl: Stone Soup is a good one. It is a classic-style roguelike that does not feature sound effects or music of its own. I will frequently queue up podcasts to listen to while I take a run or two. Source: over 2 years ago

If you're down for an older-style roguelike, Dungeon Crawl: Stone Soup is free and it's optimal for a keyboard that has a 10-key (numpad) for movement. There is an endgame, but it takes a lot of luck and doing to reach it. I just poke at the game on occasion to see how far I get. Never been within any reasonable distance of the end. Source: over 2 years ago

DCSS or Dungeon Crawl Stone Soup as it's known in full is considered to be one of the best roguelikes out there. DCSS originally released in 2006, it's a fork ofLinley's Dungeon Crawl aka. Crawl (1997) which again is based of off modified NetHack code (1987). Source: over 2 years ago