I believe the Savage Model 99 would be an excellent addition to TheHunter: Call of the Wild. It would be an additional lever action rifle, one of the less represented styles in the game, but not a “western” gate-loaded action either.
The Savage 99 was produced in a large variety of cartridges in its 98 year production run. Some of those cartridges are listed below, and cartridges not already in the game will have suggested class coverage.
.308 Winchester
.243 Winchester
.30-30 Winchester
.22-250 Remington
.300 Savage (3/4-7/8)
.250-3000 Savage (2/3-6/7)
.303 Savage (2-6)
7mm-08 Remington (3/4-7/8)
.284 Winchester (4-8)
.358 Winchester (5-8)