You may be talking about a Direct Purchase Program, defined as:
"direct purchase program
A SEC-regulated program which enables a company to sell shares of stock directly to investors, rather than through a broker, enabling the investors to avoid paying a commission. Direct purchase programs are a good way to invest small amounts since you don't even have to be a current shareholder in order to purchase the shares. The company will not charge you a commission, but they may charge you a small fee in order to set up a stock purchase account. also called Direct Stock Purchase Plan (DSP)"
There are literally 100s of companies that have these plans and the rules for each one can be different as far as minimum investment, periodic investment, etc. My experience has been many blue chip companies ("value" stocks) make up most of those that have DSPs.
However, that is not always the case. XM Sattelite Radio would be a "growth" company that has a DSP. Find info on it here:
http://phx.corporate-ir.net/phoenix.zhtml?c=115922&p=irol-xmform
I'm not recommending XMR just pointing it out as a growth stock that has a DSP. The relevance is that many if not all of the publicly traded video gaming companies would be considered growth stocks.
I would suspect that if you can identify which ones are publicly traded (EA, Midway, Take Two, etc.) they will have an investor's inforamtion section on their web site. It is there you may find out if they have a DSP either through an FAQ or a dedicated page like XFM.
One thing to think about with DSPs is to know how to sell the stocks when you want to. If you are the holder, what access to the markest do you have to sell the stock when you 'd like? It may be a simple process or you may have to go through a broker, which would probably be simple but would cost you a fee of some sort for sure.
Hope that helps.