I rarely write reviews but wanted to shed some light for the "Activation key" problems that people were having...
Credits go to this article from the community hub -http://steamcommunity.com/app/45730/discussions/0/613940109841685105/
In short -
Report problem to https://www.fuzeqna.com/capcomsupport/consumer/question.asp
From Level 1 Dropdown - Select "PC"
From Level 2 Dropdown - Select "Dark Void Zero"
- Provide your serial key with explaination
- take snapshot (I used Window's snipping tool) of your activation error and also snapshot of Steam's receipt.
Within the next day, Capcom's customer support responded and activated my key from SecuROM's database.
Now for the actual review of the game itself -
After only playing this game for an hour, I would say that it was worth my $1 from steam's capcom sale.
It has a nice classic, retro feel reminiscent of my childhood NES days.
I will say that the controls are rather clunky which provides challenge of playing this game.
The game allows you to map the controls on your gamepad and
also switch to fullscreen (thru menu option or pushing ALT+Enter).
Very simplistic and easy to pick up.
Reminds me of a mash-up between Metroid and Contra.
I only recommend this game for it being only $1 and having the will/courage to go through the trouble of activating your key