Stay Frosty Remastered - TTRPG

The bugs are through the perimeter, the gates of hell have opened, the mothership is landing, and the Captain's brain got sucked out. There's only one thing you can do, Marine: STAY FROSTY!

Stay Frosty is a complete old-school sci-fi TTRPG of future marines versus the universe. Use these rules to play in the style of your favourite military sci-fi movies and video games. Players have to balance escalating tension and dwindling resources against Staying Frosty to complete their missions.

The system is loosely built on top of the legendary Black Hack TTRPG, in turn based loosely on D&D.  What does that mean?!

• The central resolution system is 1d20 equal to or above an Attribute; if you have advantage, you roll twice and take the better result, if you have disadvantage, you roll twice and take the worse result. 
• Four Attributes - Brains, Brawn, Dexterity and Willpower - determined by rolling 3d6 in order. Lower is better!
• Eight classes or "MOS": Armor, Cyber, Engineer, Infantry, Intelligence, Medical, Psi Ops and Spec Ops. Each gets a pack of tools and benefits. Armor, for instance, gets a light tank or APC and a repair toolkit, and has advantage to operate and repair vehicles. While Intelligence receives advantage when gathering information and on initiative when executing planned attacks and also get a wrist-comp(uter). Some are stat-locked! You can only be a Spec Ops if ALL your stats are 10 or less, and you get all the best toys and a beret.
• Roll for rank! On a 1-3, you're a Private, and get a combat knife and +1 HP per level. On a 4-5, you're a Sergeant, and you have a swagger stick and advantage on Battles of Will. On a 6, you are a Lieutenant, get an autopistol, and can give advantage to a Private or Sergeant once per encounter.
• Supply die! After using an expendable item, roll the item's supply die, and if it comes up 1 or 2 you reduce the size of the die. When you roll a 1 or 2 on a d4 that's it, all done. Click, click, click.
• Psi-Powers! Roll above your Willpower to execute one of the 9 psionic powers. Did you fail? Push yourself, risk Brain Bleed, take damage equal to how much you failed and cast that power anyway. 
• Level up automatically between missions. Campaign play as standard!
• Danger Die! When the players move between point-crawl nodes, enter dangerous areas, linger too long, or rest in a dangerous place. Something always happens! Tension builds, clues are found, consumables deplete, effects end, and maybe even things get hot and Tension Explodes (please see the included Going Apeshit table)
• STAY FROSTY! As the tension rises, so does the FROSTINESS. As the squad get's frostier they become more effective but WATCH OUT! If Tension Explodes you're in for a world of hurt.