Tomb Raider I-III Remastered Starring Lara Croft

Near the beginning of the "Nightmare in Vegas" level, which you can access by finding all the secrets in the other 4 levels of the Golden Mask expansion, you will arrive in a big room with white and black tiles, from where you will be able to access the area with the boss, for example. In the middle of this big room, there is a tall sculpture covered in gold, which you can jump on to get a Large Medipack.

To get this achievement, you simply need to do a handstand when you climb on the block which has the LArge Medipack (should be Action, Up and the Walk button all together). Be advised that you need to do it when Lara is holding the platform's edges with just her hands. If you wait just one second while holding the edge, she will get in a "Ladder" position, which is not possible to do a handstand in. If it happens, get back in her "just the arms" position and do the handstand immediately.

Golden Mask - Level 5 - Nightmare in Vegas

Near the beginning of the level, you will arrive in a big room with white and black tiles, In the middle of this big room, there is a tall golden sculpture, which you can jump on to get a med pack.

Do a run and jump to climb up the sculpture, while hanging from the ledge (holding Action), hold Walk then press Up, and Lara will pull up to a handstand.

I play with modern controls X + R1 + D-Pad/LS Up