The highly addictive $0.99 physics puzzler Where’s My Water? continues its run as the best-selling iPhone game on the App Store, with 3D action title Tank Hero coming in at #2 this week. Zynga’s social word game Scramble with Friends takes out the number three spot, while evergreen iPhone favorites Fruit Ninja and Angry Birds round out this the best iPhone games this week.

#1 Where’s My Water?

Help Swampy the Alligator by guiding the water to his bath tub in this highly addictive physics-puzzler from Disney games. Featuring 80 unique and challenging levels, crisp cartoon visuals and plenty of bonuses to uncover, Where’s My Water? will keep you saying “just one more level” for hours.

#2 Tank Hero

Hugely popular 3D tank shooter Tank Hero is guaranteed to chew up some time, with 120 unique and challenging levels spread across three different worlds. OpenGL graphics give the game a visual edge, while a big variety of weaponry, enemies and three original game modes will keep you coming back for more.

#3 Scramble with Friends

Zynga’s back with Scramble with Friends, the follow-up title to their extremely successful Words with Friends franchise. It’s a fast-paced game of word-finding in a jumbled grid, where you slide your finger from letter to letter to make new words. Featuring a challenge mode for friend-on-friend action as well as Facebook login, Scramble with Friends is set up for some serious social competition.

#4 Fruit Ninja

A frantically fun $0.99 hack-and-slash title from Halfbrick, Fruit Ninja is no stranger to the top 5 with over 6 million iOS downloads to date. With three action-packed game modes, multiplayer and global leaderboards paired with slick 3D graphics, Fruit Ninja is easily among the best casual games for iPhone. Recently updated to include the new pomegranate fruit – slice it as many times as you can before it bursts apart!

#5 Angry Birds

The top selling iPhone game of all time now sports a mind-blowing 300+ levels packed full of angry action, as well as leaderboards and achievements and a bunch of social features. The latest version (2.0.2) brings special Happy Birthday themed levels and an all new expanding orange bird.  With new updates released all the time, Angry Birds is one of few essential iOS titles.