Will unrelevant articles hurt my seo???

Hey.I've been running a multi-niche website for around 8 months... Its main niche is hacks for games and i have posts for various game hacks.My friend had bought some articles about tech hacks for his blog but hi never published them and thrown away, i asked him for the articles and he gave them to me...Now i plan to publish them on my site, will this hurt my seo or increase the authority of my website?

WOW? No replies ??? Why not people.. come on.

If the articles are totally unrelated and they overwhelm the main content for the site, the site's "theme" may be affected.

If they're legit articles that's as much harm as it can do. If they're spun articles you're at risk of a manual review.