I own this game,I have no idea how

[A-Stranger]

I didn't buy it, I didn't get it as a gift, it just showed up.

Why?

[CustodianV131]

Same here. Did you buy Dungeonmans? I think it might be conneced to that.

[Wizard.Exe]

if you owned the full dungeonmans champion edition (not the upgrade) before demon truck launched you got it for free as a thanks from the dev