Doom Day

What if... Doom invaded Real Life? Now that'd be a problem. Unless the ones facing the refugees from Doom land were two Doom fans.

Enter Tennie and Hertog Jan, whose boring afternoon was interrupted by a Space Marine game of Capture the Flag!

This is the premise behind Doom Day - and, needless to say, Hilarity Ensues.

For Doom fans, this fan-made short film is a must-see.

Tropes used in Doom Day include:

Acceptable Breaks From Reality: we can say that this short predated Scott Pilgrim vs. the World in terms of "video game-style fights in real life". For starters, the duo's speech is shown through Doom-style chat.
Announcer Chatter: provides roughly ninety percent of the spoken dialogue.
Ax Crazy: let's just say that, once they get their hands on it, Tennie and Hertog Jan enjoy the original BFG a bit too much.
Non Sequitur Scene: after the Red Team starts hunting down HJ, there's a Space Marine trying to catch up with his comrades, only to randomly explode.
Bloodless Carnage: zig-zagged. Tennie and Hertog Jan don't bleed, while the people from the game do.
Bolivian Army Downer Ending: Played for Laughs.
Comedic Sociopathy: the first thing Hertog Jan does when he sees Tennie in "Doom-vision"? He starts punching him.
Failed a Spot Check/Unusually Uninteresting Sight: Hertog Jan. Seriously, how can you not notice noisy Doom enemies roaming down the street, outside of your window?
Genre Savvy: sure, Doom characters, invade the same town where two fans of the game live. It takes a while, but the protagonists' skills at Doom turn into a pretty high level of Genre Savviness soon enough.
- Wrong Genre Savvy: ... until they run out of ammo, that is.
How Do I Shot Web?: it takes a while before the duo gets a hang on the whole "Real Life Doom" thing.
Idiot Ball: um... Tennie? HJ? There are other weapons aside from the BFG in your inventory, you know. You were browsing through them less than a minute ago.
Mythology Gag: before the final stand, Hertog Jan's "puzzled expression" is lifted straight from the Doomguy. However, the whole thing is Reference Overdosed.
No-Holds-Barred Beatdown: Tennie got the crap beaten out of him... twice.
Painting the Fourth Wall: let's just say the Doom interface is just the tip of the iceberg.
Pragmatic Adaptation: the Announcer Chatter voice is borrowed from Unreal Tournament.
Precision F-Strike: "Fuck no ammo :c"
Pun-Based Title: heh heh... Doom Day... doomsday... get it?
Punch-Punch-Punch Uh-Oh: after taking out some Space Marines, Tennie realises the last one of them has God Mode on.
Reference Overdosed: towards the Doom franchise.
The Scapegoat: Hertog Jan. To clarify, when he escapes with the Red Flag, Tennie just sits on a bench, shrugs it off, and points at his friend when an entire army of Red Space Marines starts chasing him down.
Space Marine: comes with the territory, but as a twist, due to the protagonists being Tennie and HJ, the marines take a villainous role this time.
Sprite Polygon Mix: more like Sprite Real Life Mix.
Too Much Information: Tennie is introduced by coming out of the bathroom. It wouldn't bad enough by itself if it wasn't for the pretty explicit sound effects heard from said bathroom.
Vitriolic Best Buds: as their fictional selves within the short film at least, HJ and Tennie are heavily implied to be this.
What Happened To The Doom Monsters Anyway: the answer? They're still out there.
You Suck: the Announcer Chatter's remark about HJ and Tennie getting "killed" by the Red Team.