Tight play will absolutely win in soft, low-stakes games where most of your opponents are playing loose.
In tougher games, it helps to be loose (at least in certain spots) to remain unpredictable. If you're very tight, you'll also need to modify this for short-handed play. By the time you get to 3-handed and heads-up in particular, loose-aggressive play is definitely the way to go.
If you're in soft full ring games, continue playing tight, but you may want to look at a few ways to open up your game such as raising wider in late position.
in the beginning it better to play a bit more tight. The tournament is going to play for at least a few hours so there is no need to bust on your third hand cause you got into a big pot with A pair of Aces but lost to a two pair.
Once you you into the money itís time to get a bit more aggressive as your best shot of winning is going to the FT with a large stack.
However you do need to mix it up throughout the tournament so you donít become predictable. Tight players will get recognized for those who pay attention so once you starting calling or betting they know youíre hand will probably beat thereís and they wonít play you as much.