https://gfycat.com/leafyweepygoldfinch
How it Works
Weapons and powerups are removed from the map, and will sometimes be replaced with crates. All enemies have a small chance of dropping a key. Use a key to open a crate and get a random weapon or powerup.
Update 1 (12/10/17)
- Improved support for weapon mods
- Added support for Heretic
Download it if you want
Spoiler: More ScreenshotsKey and Chest Sprites by Blue Shadow