Unlockable - Extra Missions: All Gnome Locations |
| Stoplights: The gnome in level 7 | Kill the snipers at the spawn then make a staircase of boxes. The gnome is on the facade's third story left (search with the sniper scope then TK it). |
| Psi Pool: Second gnome in level | Destroy the triple turrets to the right of the entrance to Marlena's chamber. The gnome is in the back left corner of the adjacent computer room. |
| Gasoline: First gnome in level 6 | After the fusion reactor is deactivated, walk through the door and climb down the ladder to find the gnome in the pool. |
| Survival: Second gnome in level 5 | Start walking forward when the graveyard battle begins. You'll see the gnome behind a tree in the far corner (near a medical kit). |
| Floor of Death: First gnome in level 5 | Destroy a vent at the marble atrium in the hall leading to the illusion chamber control room. Enter the shaft and turn right twice to find the gnome. |
| Up & Over: Second gnome in level 4 | In the conveyor belt room, there is a pair of ladders in the far right corner. Hop off the conveyor belt to scale the fence. The ladder leads to it. |
| Bottomless Pit: First gnome in level 4 | After destroying the four "chompers" in the room with the dock worker cutscene, the gnome is inside a secret passage connecting the pair on the right. |
| Panic Room: Second gnome in Level 3 | Inside the shipyard there's a hidden area enclosed by the large shipping crates. Face the office, it's to the left of guard tower with the crane lift. |
| Gearshift: First gnome in Level 3 | It's on the roof of the shipyard entrance near the guard post where you obtain MC. Stack up boxes to reach the rooftop, turn around, and TK the gnome. |
| Bouncy, Bouncy: Second gnome in Level 2 | It's in a niche between the two static filled jumbotrons at the very end of the level. Walk up the broken floor that forms a slant and TK the gnome. |
| TK Alley: First gnome in Level 2 | TK surf into the second story of the cryo lab once the countdown begins. The gnome is behind the wall where Leonov stood. |
| Tip the Idol: The gnome in Level 1 | Hop over the fence in the hallway just before the turret/elevator and TK the gnome to you (it can be seen through a floor vent). |
| Aura Pool: The gnome in level 8 | It's behind a boulder just before you enter the alien gateway (long green & black catwalk before the elevator to the final battle). |
| Gnomotron: Find all gnomes | Collect all thirteen main mission gnomes (and save your game each time). |
Unlockable - Unlockable Extras |
| PSI Sara Skin | Beat the game on "Hard" difficulty |
| MP3 Skin | Beat the game on "Hard" difficulty |
| MP2 Skin | Beat the game on "Normal" difficulty |
| MP1 Skin | Beat the game on "Easy" difficulty |
| Marlena Pyro Leather Skin | Beat the game on "Elite" difficulty |
| Marlena Pyro Skin (Enhanced PK abilities) | Beat the game on "Elite" difficulty |
| Labcoat Skin | Beat the game on "Easy" difficulty |
| Komiko Skin | Beat the game on "Normal" difficulty |
| Jov Leonov Skin (Enhanced MC abilities) | Beat the game on "Elite" difficulty |
| Jack Skin | Beat the game on "Elite" difficulty |
| General Skin (Enhanced TK, MC & PK abilities) | Beat the game on "Elite" difficulty |
| Edgar Barrett Skin (Enhanced TK abilities) | Beat the game on "Elite" difficulty |
| Dragon Wei Lu Skin | Beat the game on "Hard" difficulty |
| Dockworker Skin | Beat the game on "Easy" difficulty |
| Clown General Skin | Collect 6 orbs in the General Boss Battle |
| Burnt Soldier Skin | Beat the game on "Normal" difficulty |
| Sara Skin | Beat the game on "Normal" difficulty |
| Stealth Nick Skin | Beat the game on "Elite" difficulty |
| Suicide Sara Skin | Beat the game on "Hard" difficulty |
| Tonya Skin | Beat the game on "Hard" difficulty |
| Training Nick Skin | Beat the game on "Easy" difficulty |
| Soldier Skin | Beat the game on "Easy" difficulty |
| Urban Nick Skin | Beat the game on "Normal" difficulty |
| Wasteland Nick Skin | Beat the game on "Hard" difficulty |
| Wei Lu Skin | Beat the game on "Normal" difficulty |
