Use 4 bill boards (metal ones) put 3 in a box form and have it chase you in there using a high health argy. Once it’s in the square very carefully place the fourth bill board, small cracks don’t matter it won’t be able to get out. Big gaps may get you killed. If that happens just grab your stuff again and try to get it in better. Make sure to bring extra bill boards in case you screw up. Then once it’s stuck tranq it and proceed to tame. Be careful with other predators, for some reason any time I go to tame something, the coast may be clear but, something always spawns to try and ruin my taming effectiveness so be alert for any nasties and kill them before they hit your knocked out tame. The metal bill board method works with allosaurus and Dino’s of that size generally.

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