Resident Evil 5/The Mercenaries

The Mercenaries is a score attack mode which is unlocked when you complete the game. To begin with, only two characters and one level will be available, but others can be unlocked by achieving sufficiently high scores.

Rankings
Your rank on any level is awarded based on the number of points you score. In a Duo (co-op) game, both players' combined scores are counted for the rank.

Depending on the rank awarded, you will receive a number of Exchange Points to spend on Bonus Features.

Chris (BSAA)
Unlocked automatically with The Mercenaries.

Chris (Safari)
Beat the Village stage with an A rank or higher.

Chris (S.T.A.R.S.)
Beat the Experimental Facility stage with an A rank or higher.

Sheva (BSAA)
Unlocked automatically with The Mercenaries.

Sheva (Clubbin')
Beat the Ancient Ruins stage with an A rank or higher.

Sheva (Tribal)
Beat the Missile Area stage with an A rank or higher.

Jill (BSAA)
Beat the Public Assembly stage with an A rank or higher.

Jill (Combat)
Beat the Ship Deck stage with an A rank or higher.

Wesker
Beat the Mines stage with an A rank or higher.

Wesker (S.T.A.R.S.)
Beat the Prison stage with an A rank or higher.

Stages
Each stage is unlocked by achieving a B rank or higher in the previous stage.

Public Assembly
This stage is already unlocked at the start. That's the location from the chapter 1-1.
 * Enemies: Majini (town), the Executioner and Cephalo.

The Mines
That's from chapter 2-2 but now lighted up.
 * Enemies: Majini (town), Reaper and Cephalo.

Village
This is the Village from chapter 3-1. Flash grenades are useful, because it kills Bui Kichwa and the Flying Plagas instantly.
 * Enemies: Majini (Wetland), Giant Majini, Bui Kichwa and Flying Plagas.

Ancient Ruins
That's the location from the chapter 4-2.
 * Enemies: Majini (Wetland), Giant Majini, Cephalo and Duvalia.

Experimental Facility
The first map that is not in the main game. Using Stun Rod and Rocket Launcher works well against Majini and after sometime only Lickers will spawn.
 * Enemies: Majini (Base), Lickers

Missile Area
It is the location from chapter 5-2.
 * Enemies: Majini (Base), Gattling Gun Majini and Cephalo.

Ship Deck
It's the starting deck from chapter 6-1.
 * Enemies: Majini (Town), Chainsaw Majini (Red and Blue), Big Man Majini and Cephalo.

Prison
It doesn't appears in the main game. Shotguns, Proximity Bombs, Hand Grenades are useful in this Stage. The new enemy is the Executioner Majini that is very hard to kill. The best tactic is shooting his plaga weakpoint at his back with a powerful Weapon (Magnums, Shotguns, Snipers)
 * Enemies: Executioner Majini (Red), Majini (Town) and Big Man Majini.