From Halopedia, the Halo wiki
This is a walkthrough for the Halo 3: ODST level Uplift Reserve. This is the fourth level of Halo 3: ODST. For this mission you play as Dutch. Your mission is to pacify Covenant forces in the Uplift Nature Reserve. While your initial loadout for this mission is the SMG and a Spartan Laser. With this mission you can play it three ways: slow, fast, and really fast. If you're playing really fast skip to the bottom and read the Really Fast Walkthrough. If you actually want to play the mission then just keep going. It is important to note that as this walkthrough is at the Legendary difficulty, all strengths of enemies reflected are at the Legendary level, but contains notes for lower difficulties. Good skulls for this mission are Tough Luck and Grunt Birthday Party.
If NASCAR had Guns (Or, Safari, Marine Style)
When the mission starts switch to your SMG and head up the path. Once you reach the top, turn left and head behind the boulders to come up behind the Brutes and Grunts. Grenade and shoot. With help from the Marines, you should prevail fairly quickly. From here you have two choices on how to proceed and it's simply a matter of preference. Both ways work, and they both share equal risks:
Why didn't I get the Extra Insurance?
After the tunnel go right and quickly head up the hill on the left running over everything (Brutes, Grunts, Jackals). Once you're clear hop out and find the Fuel Rod Gun the Grunt was carrying. Give it to your passenger Marine (getting back your Spartan laser if you gave it away) he'll go nuts firing fuel rods at everyone instead of charging up a laser. Drive down and through the puddle towards the beach, keeping an eye out for the Banshees and a Chopper. Just keep driving in circles and don't advance until you've killed the Chopper and the Banshees are dead or have given up. Next is just fast driving and lots of ramming. Head up the path. Let your passenger with the Fuel Rod Gun do most of the heavy killing but feel free to ram the Shades he misses. It's better than letting them shoot at your back. Watch for the Ghost that's going to start speeding away. Charge it and kill it before it makes it up the path. Once you get your checkpoint, stop for a second and wait for the Phantom in the next area to clear before going forward. Your Warthog is probably going to be pretty beat up here so take it easy before you rush in to the next area.
I Always Get Stuck in Traffic at the Bridge (Or, You thought your toll takers were rude...)
When you advance into this area you are once again faced with the choice of Fast or Slow. Both have their risks, and advantages.
Feeding time at the Zoo (Or how a Zebra killed the Lion)
As your head over the Bridge, change rides. Your beat up Warthog won't last so take the fresh and shiny one on the Bridge. Hopefully you still have Marines, preferably with the Rocket Launcher. If so, your life just got easier. If not you're in for some chop, but it's not unmanageable. Coming off the bridge, stay to the right of the path and avoid the fight. Drive up the path and ram the Shades. It's easier than any other option. When you see the Warthog husk and rest station you should get a checkpoint. Take a second and formulate your plan. Again you're going to have two choices. Both are dangerous and risky, and only skillful evasion and good aim will help you. Neither one is really faster than the other so it's a matter of preference, do you trust the Marine AI or not?
When you're done grab the fresh Warthog from the gully and get some new Marines if you need them. There's a Rocket Launcher wielding Marine around so you can think about letting her go for a joy ride. Hop in and start up the next path to the top of the hill.
Wait..What? You want me to drive where? (Or why I don't listen to Passengers)
You've made it this far, so now you've got a few turns and you enter the final arena. There barriers on either side of you with Grunts and Brutes behind shooting at you and a Wraith at the top waiting to kill you and to top it all off, a War Chieftain with a Fuel Rod Gun waiting to strike. Two choices here, drive around until everything is dead and drive over the edge of the cliff. Or just skip past everything and drive over the cliff. Either way you've just finished Uplift Reserve.
Really Fast Walkthrough (AKA the Speed Run, Coward's Path or MOMMMY!)
When the mission starts pull out your SMG and head up the path. Once you reach the top, turn left and head behind the boulders to come up behind the Brutes and Grunts. Grenade and shoot. With help from the Marines, it just takes a few seconds. Flip the Warthog and jump in. Don't wait for the Marines because you're not going to need them. Speed past the Wraiths and down the path until you reach the tunnel. Ditch the Warthog for the Ghost and start boosting. At the end of the tunnel go left and avoid those enemies. Keep boosting through the next area, avoiding any confrontation up to the next clearing with the Wraiths. Swing around the ground and use a little maneuvering to get around them and onto the bridge. Once over the bridge, either boost over the cliff, or boost through the next set and then take a second to rest up real quick before you get to the platform. Go up to the landing platform and sharp turn right to speed past the enemies and Wraith here. Boost past everything and over the cliff.
Notes for Legendary Play
Notes for Lower Difficulties