Default Best screen recorder app for Nexus 7?

This is my first time owning a tablet (Nexus 7 2012 wifi to be exact). Bought it 2 weeks ago and i wanna try a screen recorder to.record my.gameplays, and i also wanna know.if it is possible to use such app on a stock, unrooted device?

Sent from my Tensa Sensation XE using Ban Kai
MY DEVICES:
HTC Sensation XE with Beats Audio z715e
CURRENT ROM: ViperS/C2 5.1.0
KERNEL: SebastianFM 1.0.4
RECOVERY: 4Ext Recovery Touch 1.0.0.6 RC1 with 4Ext SmartFlash
HBOOT: 1.29 Unlocked, S-ON
PREVIOUS ROMS: Revelation 1.0.3,ViperS/C2 3.1.4,3.1.3,ViperS5.0.0
OTHER DEVICES: Samsung Galaxy S Duos
ROM: Stock ICS
KERNEL: Stock
TABLET: Nexus 7 32gb (2012)
ROM: Stock 4.4.2
KERNEL: Stock

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