Alien Vs Predator Jaguar Remake Windows game

How can I run this on Windows 8.1 (eg, without DX12)? Keep getting "DX12 is not supported on your system. Try running without the -dx12 or -d3d12 command line argument." To hell with Windows 10, but this mod looks like fun.

Just found out about this project and tried it out. It's really, really cool. Seriously. You are a legend for doing this.

As I played, I wrote out a list of differences I noticed with the original game and bugs I saw. No pressure or anything, just a lot of mostly nitpicky stuff if you're ever interested in getting the project closer to the original in feel:

- Selected menu item triangle is visible on the title screen before the menu is
- Security card pickup sound is missing
- Aliens move too quickly - I can tell because standing inside the Brig with the door to the outside open, they close on me from outside before I have the chance to fire three shots with the shotgun - also running away from them, I gain distance too slowly - their original movement speed is perhaps 60 or 70 percent of the current speed, though of course it varies in the original depending on system load
- Aliens do damage when their attack "opening" or "starting to attack" animation starts instead of when it finishes
- Second Alien attack sound effect plays even when the attack does not connect
- An Alien spawned between the first two doors (the ones really close together) leaving the brig
- First frame of Alien death animation takes too long
- Shotgun out of ammo click sound effect missing
- Got a soft lock when I accidentally hit E twice to enter a duct. Game booted me out of the duct and into a black void and I began falling forever - during this time hitting esc to pause the game was disabled
- Map is zoomed out too much
- Map starts fully filled out (you probably know about this)
- Computer text in Briefing Room has typos (e.g. XENOMOEPH, LIETENANT) - I believe the original game's source code includes the complete in-game text - let me know if you can't find it
- Items seem to despawn. I saw shotgun ammo in one of the Brig cells that had vanished by the time I killed the Alien that was in there and went in to get it. Same thing happened with a Medikit near the east elevator on Sublevel 3
- Doors close on you/eject you(?) instead of opening again
- Door opening animation is wrong, should be a simple translation left and right
- Can't see shotgun blast sprite on hitting a barrel
- Enemies/items often seem drawn too high in the air
- No food in the kitchen
- No elevator sound effect
- An Alien got stuck in place as I exited the east elevator on Sublevel 4
- "Access denied" sound effect missing
- Facehugger spawn sound effect missing
- Facehugger spawned behind its egg and got stuck back there briefly
- Facehugger's corpse continued with momentum instead of stopping dead
- Pulse rifle (enlisted man corpse) is missing from "fake armory" dark area of Sublevel 4 near V5 on Scott Bigham's Sublevel 4 map (this Pulse Rifle pickup is also missing from his map)
- I don't die when I am killed, but I do soft lock
- Shortest possible shot with the Pulse Rifle - sound plays about twice as long as it should
- Food spawned in the Kitchen when I returned from the Pulse Rifle area of Sublevel 3!
- Food restores way too much health - should be 10% - and 25% for Medikits, incidentally
- Eggs die instantly to the Pulse Rifle instead of taking perhaps 1/3 or 1/2 second's worth of fire
- The game seems very stingy with ammo spawns in Sublevel 3 and to a lesser extent Sublevel 4
- When exiting the duct into the Sublevel 4 medlab (to get Security Card 6), two Aliens ran between the cargo boxes and attacked me instead of remaining stuck behind them
- Medlab looks great! (not a bug)
- Facehugger is too slow to jump up on my face - in other words the whole thing from it starting to jump to it being on my face takes too long
- Facehugger graphic on face has wrong aspect ratio (looks like 4:3 stretched to 16:9)
- Can not shake off facehugger - this may be because I was dead
- Motion tracker seems to be missing from its spot in Sublevel 5
- Aliens got stuck in place a lot on Sublevel 5

Let me know if I can help clarify any of this. Was really cool to play even at this stage!

Hello everyone. Sorry for the dumb question, but does this need a copy of the UE4 Runtime to work, or is it standalone? How am I supposed to run it?

Hey, I'm still the guy who tried to download this a hundred times, and it still gives me the file is corrupted, every single time I do. Any chance you could upload the archives to a different service, like mediafire or dropbox, and provide an alternative link? For the sake of trying. I'm just asking, don't worry if not, I still appreciate the effort. This game was magic, I just wish I could play it on Windows...