SuperTux is a open-source classic 2D jump'n run sidescroller game in a style similar to the original Super Mario games.
Run and jump through multiple worlds, fighting off enemies by jumping on them, bumping them from below or tossing objects at them, grabbing power-ups and other stuff on the way.
Written using the SDL framework also see SuperTuxKart.
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Ranked in these QuestionsQuestion Ranking
Pros
Pro The game is constantly growing
New levels, new art, new enemies... The game is improving all the time.
Pro Super Mario Bros alike
Reminds of old Super Mario Bros games back in the days.
Pro The classic native Linux game
This is the classic FOSS Linux game that's been here forever.
It's the game that embodies the spirit of Linux.
Pro There are contributed levels that are very good
In addition to the main world, there are contributed levels like the Forest World which is much more interesitng than the main world and has advantages of choosing different paths.
Pro There is a boss in the game
Cons
Con The main world is boring
There is usually only one way to go with no rewards for choosing different paths.
Con The story is throwaway
Literally copies super Mario bros. Nolok is essentially a Bowser clone.
Con Difficulty is all over the place
At the end of the main world some levels are very easy and some are very hard.