Sliding Worms aren´t the Grave Digger to not create too much confusion:
Sliding Worms (スライディングワーム, suraidingu-wāmu?) are the parasitic offspring produced by Grave Diggers. They were encountered by survivors during the Raccoon City Destruction Incident. The Grave Digger reproduces by laying eggs in the sewers and inside the ground, often in bunches of a hundred...
residentevil.fandom.com
We still have to see them, so bye bye wormies. Probably.
Confirmed unlocks (I also saw all of these 2 days ago but my French ain´t too hot):
- Jill STARS Costume (2000 p)
- Recovery Coin (4000 p) 2 exist
- Defense Coin (4000 p) 2 exist
- Attack Coin (4000 p) 2 exist
- Reloading Press (4000 p)
- Chris Redfield's STARS Combat Manual (6400 p, makes perfect dodge much easier)
- Hook (2800 p, so you don´t need to find it anymore)
- Bolt Cutters (2800 p, so you don´t need to find it anymore)
- Satchel (4800 p, increases inventory space) 2 exist
- Hot Dogger (7200 p)
- Samurai Edge (5600 p)
- MUP Pistol (8000 p, infinite ammo)
- Rai-Den (12000 p, infinite ammo)
- CQBR Assault Rifle (28400 p, infinite ammo)
- Rocket Launcher (62400 p, infinite ammo)
Maybe more if you do the harder difficulties. I, for example, don´t see the grenade/mine launcher listed and it´s in the game. And who knows how the art unlocks or the bubble heads work.