Extermination Cheats - Extermination Codes

Unlock Expert mode:
After finishing the game and finding the 15 dog tags, then save the game.. Begin a new game with the yellow "Rear Of Compound" save file (0:00 time). You will begin the game with many more bullets, shotgun shells, etc but the bosses and enemies will become much more difficult.
User Cheat by ConsoleAddict

Unlock a Secret mode:
After finishing the game, finding the 15 dog tags, and Roger's knife. After the credits are completed, save the game. The save file should have a yellow star next to it. Reload this game and you will start with 300 bullets, 50 shotgun shells, 99 grenade shells, 1000 flame thrower capacity, and many more useful items. But, the enemies require double the hits to kill in this newly unlocked mode.

(M) Must Be On	EC8D31701445DC6C
Infinite Health	4C188B7E145625DD 4C1887F6145625DD
0% Infection	4C1887FE1456E7A5 4C188B821456E7A5
Infinite Ammo Machinegun	4C188FDC1456089C
Infinite Shotgun Shells	4C188FD01456089C
No Reloads Machinegun	3C188F861456E70C
Infinite Grenade Rounds	4C188FCE1456089C
Infinite Flamethrower Fuel	1C188FD41473E788
No Reload Flamethrower	4C188FD21456E788
Infinite Rockets	4C188FD81456089C
Infinite/Max Battery	3C188FD61456E7D5 3C188FDB1456E7D5
Low Time	1C1888781456E7A5
All Weapon Parts	1C188F8C1355E6A6 1C188F901355E6A6 1C188F941355E6A6 1C188F981355E6A6
Have Climbing Spikes	3C188FA51456E7A6
Have Arctic Parka	3C188FA21456E7A6
Have All Dennis' Memos	3C188FE71456E7A6 1C188FEC1355E6A6 1C188FF01355E6A6 1C188FF41355E6A6 1C188FF81355E6A6 1C188FFC1355E6A6 1C188F001355E6A6 1C188F041355E6A6 4C188F081456E6A6 3C188F061456E7A6
Have All Operation Manuals	3C188F071456E7A6 1C188F0C1355E6A6 1C188F101355E6A6 1C188F141355E6A6 1C188F181355E6A6 3C188F1C1456E7A6
Have All Staff Logs	3C188F1D1456E7A6 4C188F1A1456E6A6 1C188F201355E6A6 1C188F241355E6A6 1C188E281355E6A6 1C188E2C1355E6A6 4C188E301456E6A6 3C188E2E1456E7A6
Have All Classified Files	3C188E2F1456E7A6 1C188E341355E6A6 1C188E381355E6A6 1C188E3C1355E6A6 1C188E401355E6A6 1C188E441355E6A6
Have All Top Secret Files	1C188E481355E6A6 1C188E4C1355E6A6 1C188E501355E6A6 1C188E541355E6A6
Infinite Recovery Unit A	3C188FA61456E788
Infinite Recovery Unit B	3C188FA71456E788
Infinite MTS Vaccine	3C188FAC1456E788
Infinite Booster Type A	3C188FAD1456E788
Infinite Booster Type B	3C188FAA1456E788
Have Snow Truck Key	3C188FB11456E7A6
Have Train Key	3C188FAE1456E7A6
Have Crowbar	3C188FAF1456E7A6
Have Gary's Bomb	3C188FB41456E7A6
Have Metal Tag 1	3C188FB51456E7A6
Have Metal Tag 2	3C188FB21456E7A6
Have DVD-ROM	3C188FB31456E7A6
Have Roger's Knife	3C188FB81456E7A6
Have Dog Tag 1	3C188FB91456E7A6
Have Dog Tag 2	3C188FB61456E7A6
Have Dog Tag 3	3C188FB71456E7A6
Have Dog Tag 4	3C188FBC1456E7A6
Have Dog Tag 5	3C188FBD1456E7A6
Have Dog Tag 6	3C188FBA1456E7A6
Have Dog Tag 7	3C188FBB1456E7A6
Have Dog Tag 8	3C188FC01456E7A6
Have Dog Tag 9	3C188FC11456E7A6
Have Dog Tag 10	3C188FBE1456E7A6
Have Dog Tag 11	3C188FBF1456E7A6
Have Dog Tag 12	3C188FC41456E7A6
Have Dog Tag 13	3C188FC51456E7A6
Have Dog Tag 14	3C188FC21456E7A6
Have Dog Tag 15	3C188FC31456E7A6