Hard Corps: Uprising

Before going into the guide, I found that the Laser upgrade will point out hidden items including 1-ups, health and CP.

Here is a guide I found that should help. Most of this is not my work. If you want the source site here is the link:
http://www.gamefaqs.com/boards/997471-hard-corps-uprising/58...

There is also a video posted showing 1-up locations. The video is not mine, and again the same goes for most of this guide.

Stage 1

1.) After second M power-up: Shortly after, stand on the platform where the missile launcher enemy was to make a gold pod appear.

2.) Jump on top of the wall midboss after defeating it. Running jump off the small platform and air dash onto it.

3.) Flamethrower tower: After the first wall mini-boss, you'll come across a tower with 3 flamethrowers. A weapon pod containing an extra life flies by once you reach the top.

4.) Quicksand area: After the worm crashes through a few times there will be a flamethrower shooting up. Go underneath it and a red circle will appear. Watch for the gold weapon pod containing an extra life.

5.) At the start of the wooden bridge, jump at the top of its structure and a golden pod will appear. You might need to use the destructible platform there.

Stage 2

6.) Right before the wall mini-boss: Stay up on the vines and after the fight jump on top of the wall. A gold pod will appear.

7.) After the wall mini-boss: There will be a u-shaped vine you can climb across. Shoot the leaves on the right side and jump on the branches to reveal a 1up.

8.) Piranha bridge: Jump under the bridge onto a small rock to make a red circle appear. A gold pod containing a 1up will fly by.

9.) Right after the bridge: Stay in the treetops as long as you can. Eventually you'll shoot some tree branches and reveal a 1up.

Stage 3

10.) First pit: While falling shoot the weapon pod that flies in from the right.

11.) Rotating spike panels: While climbing upwards shoot the left wall between the second and third set of rotating spikes, revealing a room with a 1up.

12.) End of downhill boulder tunnel: After outrunning the boulder, just before the wall breaks, a pod will fly in from the top right.

13.) Before the submarine boss: There are two turning spike wheels with a pit and health pickups underneath. Instead of falling and walking under them, climb over them. Once you get in the middle a gold pod will fly by.

Stage 5

14.) Conveyor belts: A little after the first big fall when you land on the green tubes, there will be two sets of conveyor belts. Shoot the green pod that flies by at the top of the screen.

15.) Lava area: at the first set of conveyor belts, jump to the topmost left one and you will get another 1-up there via golden pod.

16.) Green tubes: Where there are green tubes on the floor and ceiling, smash one of them on the ground and step inside to reveal a 1up.

Stage 6

17.) Flamethrower tunnel: During the flamethrower section a green pod will float by, jump down and hang onto the train car to collect it.

18.) Train switch: When the first train falls off the track, jump onto the train higher up and hang onto it. Shoot the pod and collect the 1up before it falls.

Stage 7

19.) Fountain section, jump onto the platform that is between two bomb throwers to trigger one.

20.) Outside climbing section: when climbing the outside of the building the second fight with the helicopter near the top, the platform right below it kill the enemy and stand there for a chest to appear with a 1up.

21.) Elevator shaft after helicopter fight: On the top left platform with a sniper.

Stage 8

22.) Area where ceiling crushes you: There are at least 2 gaps in the ceiling. Jump up in the second one and kill some enemies to get a 1up out of the box.

----------------------------NOT IN VIDEO-------------------------
23.) Missile riding section: On the set of missiles going to the right, hang onto the bottom one and ride it underneath the wall, then jump and stick to the right side of the wall you just went under. Climb up to the platform the enemy is standing on for another 1-up.
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24.) Before entering the ship to fight the Mid-boss (Vitis Engine): Underneath the last ledge before climbing into the ship to fight the Vitis Engine there is another 1-up. Hang underneath the ledge and go to the far right. Shoot the pod that spawns from the left over the platform
where the turret was for a 1-up.

25.) Before final boss: Climb the rail where the three black missiles shoot vertically.
About 3/4 across, you'll activate a gold pod.