Assets used for TalTech jam version:

• SuperGrid - permanently free blockout/prototyping pack for Unreal Engine (parts I used: ladder, wall, box, elevator)
• sounds

Assets added after TalTech jam:

• Metahumans for characters

Will probably use:

• World Director NPC - PRO, was “freebie of a month” time ago, now is paid. Said to be a good solution for a massive number of enemies.
• Advanced Glass Material Pack - permanently free asset
• Megascans/Quixel assets (free for Unreal engine users)