Legitimate; legal; allowed by the rules; valid.
Not using cheats.
Cool by virtue of being genuine.
Genuine, actual, literal or honest.
Genuinely good and possessing all the required or expected qualities; the real deal.
Legitimately; within the law.
Honestly; truly; seriously.
A legitimate; a legitimate actor.
A legitimate child.
In conformity to statutes regarding size, quality etc.
Describing a crime or offence regulated by statute; legally punishable.
Made or introduced by statute; proceeding from an act of legislature.