Using 3d lego models in game allowed?

Hello,

Is was wondering if it is allowed to use some 3d lego models in a game. The models are based on existing lego products. Or does that count as intellectual property, and what if I slightly change the models?

For jnstance this game is using a lego character:

https://play.google.com/store/apps/details?id=co.il.mygames.ar&referrer=utm_source%3Dgoogle%26utm_medium%3Dorganic%26utm_term%3Dbrick+run+google+play&pcampaignid=APPU_1_O5XoVOaYO4HwOf6dgOgK

Thanks