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Minetest
Minetest is an open source voxel game-creation platform with easy modding and game creation
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I looked it up, they are actually groundless in this case: https://github.com/minetest/minetest/issues/13363#issuecomme...
There is also Terasology - a Minecraft-like voxel game with fancy graphics: https://terasology.org/
debian and ubuntu ship an implementation of tetris in the bsdgames package (and bsd has included it since the 80s), gnu emacs has included tetris.el for 25 years (despite removing yow lines), and debian also includes bastet, blocks of the undead, crack-attack, gtkboard, kblocks (which is part of kde), ltris, netris, petris, stax, termtris, tetrinet, tint, vdr-plugin-games, vitetris, /usr/share/vim-scripts/plugin/tetris.vim, and quadrapassel (which is part of the official gnome release)
you've been able to buy cheap '9999 in 1 block game' hardware at any import port with 200 nematic pixels for at least 15 years
i've written two tetris clones myself, http://canonical.org/~kragen/sw/inexorable-misc/tetris and https://gitlab.com/kragen/bubbleos/blob/master/yeso/tetris.c, and no lawsuits have yet arrived
also, minecraft is just an infiniminer clone, and there are fifty zillion clones of each of pacman, space invaders, breakout, snake, doom, and super mario
so these novel legal precedents you mention are at least still being very narrowly applied in practice
The actual game itself, yes. Based on this open source project though which provides the language its written in and core engine tech: https://github.com/aardappel/lobster