Hello , First I want to write all races of WarHammer 40k that exist and some could be playable , (and some are already playable) : Chaos Space Marines , Chaos Daemons , Dark Eldar ,Eldar , Necrons , Orks , Tau Empire , Tyranids , Space Marines , Astra Militarum , Inquisition , Adepta Sororitas , Imperial Knights , Militarum Tempestus. Tyranids Should Be Playable ! And Second thing : The Alignment : there should be alignment of what you are good person or bad person even if your race is for example the Chaos Space Marine you could be able to free from your control and be good. If you've got some questions, some corrections , or something like that write it here please. Have a good day people.