When comparing Cube 2 (Sauerbraten) vs Dungeon Crawl Stone Soup, the Slant community recommends Dungeon Crawl Stone Soup for most people. In the question“What are the best open-source games?” Dungeon Crawl Stone Soup is ranked 9th while Cube 2 (Sauerbraten) is ranked 96th. The most important reason people chose Dungeon Crawl Stone Soup is:
There are a few different classes available at character creation, each one has it's own abilities that are different from the others. Creating one is quite simple, which makes for a fast way to get into the game and start playing.
Specs
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Pros

Pro Good map editor

Pro Multi-platform
Linux, Windows, OSX

Pro Fast and smooth
Graphics not resource intensive. Compared favorably to Unreal engine.

Pro Free
Available under an open source license
Pro Simple character creation with different classes
There are a few different classes available at character creation, each one has it's own abilities that are different from the others. Creating one is quite simple, which makes for a fast way to get into the game and start playing.
Pro Gold Standard for roguelikes
The controls and replayability have been refined over the years. Whether the player chooses to play with Tiles (graphics) or console (ASCII) the game works well even when choosing online or offline play. Either way there is just enough interface to play the game.
Cons

Con Not moddable

Con No tutorials, forums are "strange."
Con Not an actual engine
Con Have to fiddle with controls
Being that the game uses an emulated keyboard on screen it works best on tablet, though is not really the preferred method (but is the only one) since it takes up screen space.
