This has been impossible to buy on PC since mid-2019, when the developer pulled several of its games from sale; the publisher's announcement said this was 'with the intention to update' them and republish them on PC (well, on Steam) 'at a later date'. Bunny Must Die had received some gameplay changes for the PS4 and Vita versions in the previous year, and has since been released for the Switch, but it still can't be bought on PC in any form.