Best foss games

Which is the best foss games available.
I want games that are good and addictive .Games I could recommend to friends.Games that are multiplayer are better to know .Liquid war OS and SuperTuxKart are nice games but I was not able to play multiplayer in it ,can anyone help me
I just know few that is sokoban ,apple flinger and liquid war OS

Games

From my repo:

Thanks ,was helpfull :grinning: