>>719998518
You can stop after mgs2 even tho it ends on a cliffhanger. Go back and do all the stuff you missed in the older games:

- Markhor rank in mgs3
- Foxhound rank in mgs3
- VR missions in mgs1
- Big Boss rank in mgs2
- Snake Tales in mgs2
- Nightmare mode: 100% all VR missions in mgs2