Evidently this will be an iron on (since all the colors)? It's great that your branding the shirts however I don't think it needs to be that prominent "allakhazam".
I would suggest a simple 2 color screenprint. A more general approach to the MMO market and not pigeon hole yourself to the "must advertise allakhazam" notion. I say the more general approach because you will move more product, make more money, and the shirts will
never be outdated. I know how companies and higher ups are always wanting to plaster their logo on everything but honestly it's not going to sell. Make the designs general, have a trendy design, and people will say "hey where did you get that shirt?, I want one!" Point them to allakhazam.
example:
OMG! I know
Propaganda is a damn good screenprinter and they printed all the threadless.com T's back in the day when I participated.
This week I'll do some designs for ya. It's right up my alley.