[2021] Help me! I want to make a Warframe birthday party to my boyfriend, but I have no idea about the game

Edit: HE SAW THIS POST LOL OH NOOOOO

I created this account and blocked him so he can not see this post LOL but anyways... Edit: Learned the hard way that blocking people in Reddit is useless, rip

My boyfriend loves Warframe. He has played it for over 1800 hours! He always wanted to have a surprise birthday party and I'm ready to give him this gift. The party's theme will obviously be Warframe! I'm a graphic designer and I can make some decorations for the cake and for the table.

But the thing is: Warframe is not a game for me... I'm a Animal Crossing type of girl. I know absolutely nothing about the game and I failed badly when I've tried to play it. The only Warframe things I know about my boyfriend is that he likes Limbo Prime, the pet alien dog (Kubrow?) and he has talked to me about the robot aspirator vacuum trend it happened some months ago.

What other references to the game should I include to the decorations? There are memes, jokes or things only a Warframe player can understand? Do you have any ideas about how can I decorate the party? Please tell! Thanks in advance ~

TLDR: I'm making a surprise b-day party for my bf, but Warframe is an unknown universe for me and I have no idea of what to do