<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

#!/usr/bin/env python
import sys, os.path, urllib
if len(sys.argv) <= 1:
    print "https://esolangs.org/"
else:
    print ("https://esolangs.org/wiki/" +
        urllib.quote(sys.argv[1]))