You guys weren't kidding when you said Minetest supports old hardware. I just fired up 0.4.10 on a nineties era desktop system. It ran, barely, but it works. The machine in question:
450Mhz Pentium III Katmai
256MB PC133 SDRAM
GeForce3 TI 200
30GB PATA HDD
lubuntu
I'm impressed at development's devotion to legacy support. Kudos.
https://youtu.be/bf_TsJ2lKME