As you'd expect from the Guardians of the Galaxy, your band of misfits are out to capture monsters to sell for profit in Square Enix's game. Early on, you'll need to capture one, but it's not very easy. To help you out, here's how to capture the monster in chapter 1 of Guardians of the Galaxy.
Early on in the game, you'll be tasked with placing all of Rocket's Thumper devices in order to capture a monster to sell.
Soon, you'll be stuck in a room full of containers with the monster running around the outside. You'll be able to see its red glowing eyes, but that will be it. You need to do a couple of things to catch it, and it's not very clear.
How to Capture Monster in Guardians of the Galaxy
The first thing you need to do to capture the monster is shoot all of the boxes that are set up in a circle around the room so that it cannot hide behind them.
You can either command Rocket to destroy the with his barrage of rockets or simply shoot them with Star Lord's blaster. Then, the monster is vulnerable.
Now for the trickier bit - you need to find a way to slow the monster. Thankfully, your tree like friend, Groot, is just by your side.
If you ask him to use his tie down ability, which will be the only one you have at this point in the game, he will stop the monster right in its tracks. You don't even have to aim anything, just press hold L1 and select Groot and he'll do the rest for you.
You don't have to do anything else after that - the cutscene will play and your monster will be caught. This is a good introduction to use the rest of the Guardians to solve problems and progress in the game.