This is a challenge playthrough of the Overgrowth Story campaign for Overgrowth, on Expert difficulty.
The rules are simple: don't use sneaking, and kill all enemies only after they're aware of your presence. (Fighting all enemies at once is not required.)
I've reused recordings of some levels from my walkthrough video (ones that match the criteria). Also skipped levels with no enemies, for obvious reasons.
Since it's a challenge run, I'm less concerned with my actions being reproducible (and thus used riskier approaches); still, you can keep track of my gamepad input via the overlay in top left corner.
Chapters:
00:00 1. White Flags
01:55 2. Slaver Path
04:36 3. Night Raid
05:50 4. Slaver Tower
08:54 5. Slate Farm
11:07 6. Windcutter Beach
14:19 7. Ice Cliffs [reused]
16:32 8. Dog Fort
18:53 9. Dog Patrols
20:15 11. Canyon Ambush [reused]
22:08 12. Catchers
23:47 13. Thick Fog [reused]
24:37 14. Tree Climb
26:43 15. Shallow Swamp
27:40 16. Rat Base
29:45 17. Pit Duel [reused]
30:05 19. Magma Arena [reused]
31:41 22. Waterfall Arena [reused]
34:04 24. Cave Assassin
37:22 26. Rock Arena [reused]
39:41 27. Midnight Duel [reused]
40:32 28. Cat City
43:30 29. Sky Island [reused]