depends on what you are asking for with "games"... how many VIDEOGAME tourneys have I been in? Umm..two. There was some little tourney that I won when I was eight (lol...I know.) And I won a tekken 4 tourney at a local arcade. Those are my only two VIDEO GAME tourneys. But if u mean GAMES, then probably about 100 or so because I've played in LOTS of basketball, soccer, lacrosse, baseball, chess, (couple card games...like pokemon back in the day..lol). Its still the same feel as a video game tourney only there tend to be more people watching you closely in sport tourneys. And I guess you tend to see more people cry after they lose..lol. I remember I beat some 23 year old guy two years ago in some NorCal 1 v 1 18 and up basketball thing and the kid ended up sitting down and tear up after he lost. Kinda weird to see grown men cry in situations like that, which is why video games tourneys might be liked more because honestly there probably is less pressure (though there still IS pressure).
As a sidenote, its quite fun to play old guys in chess tournies...they talk a lot and have some great stories sometimes. But some of them can get pretty angry when they lose *eekk