This is a look-through-the-scope shooter by the company that made the Hitman series. It's very popular and has great reviews.
It was already reduced from $5 to 99c — which is why the thumbnail images says "80% OFF" — and now it's temporarily free.
Blurb:
" BECOME THE ULTIMATE SILENT ASSASSIN
Step into the shoes of Agent 47 in Hitman Sniper and discover the most compelling sniper experience on mobile.
TACTICAL MISSIONS IN MONTENEGRO
Hone your strategic skills and orchestrate the perfect assassination kill shot.
SURVIVOR CHALLENGE IN DEATH VALLEY
Non-stop action as the zombie hunter in a true test of your skills and speed of execution.
MORE THAN 150 MISSIONS AND 10 DIFFERENT CONTRACTS
Improve your skills for the perfect assassination as you uncover secrets and subterfuges.
16 UNIQUE GUNS
Eliminate targets, collect weapon parts and complete blueprints to unlock the most powerful guns.
COMPETE AGAINST YOUR FRIENDS FOR THE FIRST PLACE IN THE LEADERBOARDS
Boost your score and climb up the contract killer ranks to become the world's finest silent assassin. "
478m for a phone download, ouch. Still giving it a go, going to be a long download on my connection.