So how about a Technophiliac Insectoid race and a Psionic Humanoid race? They can be our two playable alien races.

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[img]http://i984.photobucket.com/albums/ae329/SlidellofOlde/my_wife__s_tali_zorah_redesign_in_3d_by_nebezial-d4szlc0.jpg[/img]

[img]http://fc06.deviantart.net/fs70/i/2012/037/0/b/sr_bug_alien_head_by_hazzard65-d4ehmwk.jpg[/img]
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And of course there's the humans too.