If you are into medieval fantasy games, then Gameloft's latest offering my entice you. It's called Rival Knights, and it's basically a knight jousting simulator game. It just showed up for iOS and Android, and is currently free. Of course, that means it comes with the dreaded "in-app" purchases, so keep that in mind. For the most part, you can get some casual enjoyment out of the game without spending any of your hard earned cash.

On top of excellent graphics, the game also features motion-capture animations and ragdoll physics. It even includes multiplayer so you can joust with your friends. Here's a description of the game from the company,

Live the fantasy: Be a knight & joust your way to victory! Compete with thousands of other players in games of glory & adventure! This is the most intuitive, action-packed & visually stunning knight combat game on touch screens!

√ Experience the thrill of fast-paced & highly addictive jousting for free
√ Sharpen your war skills with precision timing & aim
√ Battle ruthless foes & rival clans across 5 leagues to seize their castles & thrones
√ Embark on an adventure across the kingdom, become a champion & etch your name into history!

√ Motion-capture animations for knights & horses immerse you in battle like never before in a free game
√ Enjoy stunning, lifelike 3D graphics and dynamic camera angles
√ Compete in a breathtaking environment with changing weather conditions & time of day
√ Send rivals flying with real-time ragdoll physics & slow-motion effects

√ Unlock over 120 mounts, lances, armors, helms & more
√ Upgrade them at the Blacksmith to gain an edge over opponents
√ Use temporary boosts wisely to triumph in your adventure
√ Customize your crest to strike fear into your rivals

√ Challenge other players in asynchronous multiplayer games
√ Enter weekly PvP multiplayer tournaments for glory…
√ …and win King-sized rewards!
Will you ride to victory, or fall in battle?

These are troubled times for you & your people. Your kingdom is in debt, the king slain in war, no one has claimed the Champions' Thrones, & enemy clans are massing at the kingdom's borders.
Embark on an epic quest & get ready to battle your way through intense solo and multiplayer challenges in this free new jousting game. Journey from castle to castle in search of adventure & action.
Claim the Champions' Thrones with your friends. Become a legend of jousting, grab the tournament chest & save your kingdom from the hands of the awful Lord Cunnings.

Forget about fantasy MMO games, castle games & war games. If you are looking for a true fantasy adventure, this free game is for you. It features massive multiplayer online (MMO) tournaments, clans, epic knight battles, all set in a breathtaking medieval fantasy kingdom, for free. The war for the Champions' Thrones is on!
The touch screen interface afforded by a tablet and smartphone seem perfectly suited to a game like this. Give it a try and let us know what you think of the game in this thread.

Here are some links to download it for your devices:

Google Play Store
Apple's iTunes