I only played the “first” one, but that one did feel incredibly like Halo to me. Just with the added functionality of portals.

I mean you have an assault rifle, a battle rifle, a pistol, a DMR, and shotguns. I’m sure there are some other ones I’m not remembering.

Edit: I also actually liked the functionality that grenades had. Instead of a crowd control or room-clearing tool, now they’re specifically to disable enemy portals. So now you had an interesting dynamic where yes, you can portal all the way across the map (or try sniping someone through a portal) into the enemy’s base and try to score, but it also presents a nice little counter to that strategy.