Risky means the repacker might have inserted some malicious code into it... though i think there are less chances of that.
@ paid apps better buy them or try legit means of getting them for free....get $5 xbox gift card from those reward apps on google play... i ve earned 3 by now...and got over 15 last year from gamestop giveaway.
plague is nice game, but i dont think same about rayman..thats not worth the cost you pay for it.
I own more than 50 paid games, (no sideload), I found only few of them worth.....