My only requirements are these:
1) You SHOULD meet the recommended (not minimum) system requirements for the game, or at least come reasonably close. You CAN run the game on minimum specs (many people run it on old laptops) just fine, but you'd be missing out.
2) You must join the main TG guild "Ars Tactika." If later you think you'd prefer a different playstyle you're more than welcome to join one of the other guilds within TG.
3) You must obviously play where TG plays, which is on the Cimmeria-RP server.
4) You must be able to pay the $3 DL fee to Funcom, which requires a CC... and be prepared to purchase a retail box after 7 days if you like the game, along with the monthly fee standard for most MMOs.
5) You must be genuinely interested in playing the game long term (assuming you end up liking the game). Again, if you just wanna mess around a bit or think you cant hack the $15/month then this is not for you.
6) You must at the very least level a character through the beginning zone of Tortage (this can be done in a weekend).
7) You must have AND use Teamspeak.
8) You must have broadband.
9) You must be a teamplay oriented individual.
10) You must be a "Supporting Member" of TG or a member in good standing. Obviously those folks that just register with TG to grab a trial aint gonna get one (this happened a lot in Tabula Rasa). At least have some time under your belt here before you ask for free trials.

This would apply to all those that are posting once and requesting a key. #10 should be be moved up so people read it first and dont even bother.