More of studio Zonitrons' booted stock from Steam so its questionable if this key works but so far they have so here's knocking on wood. There's also an extra game here not listed by the official link (that doesn't work anymore, of course :P) so all four titles are:
Brilliant Bob
Why So Evil
Why So Evil 2
They Came From the Moon

May the winner be spared the torture these beasts may bring them. o.o