Room temperature, multi wavelength Q-switched operations in 2% Er:YAlO under flashlamp excitation was demonstrated. Lasing occurred predominantly at 1658 nm and 1665 nm with the emission of the wavelengths orthogonally polarized. The use and orientation of a intracavity polarizer dictated the lasing wavelength. Spectral and temporal high resolution analysis of the emission from the Er:YAlO laser revealed dynamic cascaded lasing between the 4S3/2 4I9/2 ( = 1658 nm) and 4I9/2 4I13/2 ( = 1665 nm). In Q-switch mode, the output ranged from 3 – 10 mJ/pulse and pulse duration of 90-110 ns (FWHM).