Bloodborne: all dodge animations and invulnerability frames are now DS style heavy rolls
(I was gonna go with the only ammunition is blood bullets but then again a lot of folks just brute forced without using the gun anyway)
Banjo-Kazooie: Every time you collect a jiggy you are booted back out the stage ala Super Mario 64, the note collectable system still stands as is
Castlevania Symphony of the Night and all its successors:
No backdash
Dark Souls: The player character lets out a snarky quip after they kill an enemy or boss.
Oh man, just imagine, recurring canned dialogue related to the enemy type
Going through the catacombs conking out the reviving skeletons...
"No bones about it"
"bone appetite"
"No bones abo-"
"Spare ribs tonight"
"bone appe-no bones abo-bone appet..."
This concept could be a thread in itself, it's so wonderfully horrible
Classic Sonic Games:
Rolling does not provide invulnerability to normal enemies.
This is incredible in how subtle a change it seems yet how much it would ruin it.
Well played.