Will I be able to hit level 60 in 1 go?

Only Completionist is there, but IDK if it give xp bonus since 5% that it gives is in 20% already. OT achievements gave 10%+5%+5% (Cimpletionist 5%, Power Gamer 10%, Extreme Power Gamer 5%). If it gives additional 5%, maybe level 60 can be reached..

Just finished ME1 earlier today. Managed to get to 29 on Ilos. The amount of XP needed to get from 29 to 30 is absurd. I think it's impossible to get to 30 in one playthrough.

Yes, I got the completionist achievement, but it doesn't say if it gives bonus xp. I assume it doesn't?

For those that tried for a completionist run but did not hit the level cap, what was your total XP? I want to compare it to the original ME1's requirements.
I know they said they changed some of the XP requirements so that you could hit the maximum in one playthrough, but if that is actually not the case, then they miscalculated. Unless you have to really explore every square inch of the galaxy for every last shred of XP (which would really suck).

For comparison, here are the late-game XP requirements in the original Mass Effect 1:
Level 60: 862 100
Level 59: 662 100
Level 58: 542 100
Level 57: 462 100
Level 56: 406 100

I do not know what the new XP requirements are for In Mass Effect 1 Legendary Edition.

NOTE: If we are comparing Classic Mode (1 - 60) versus Legendary Mode (1 - 30), then it should work to something like this:
- Legendary 30 = Classic 60
- Legendary 29 = Classic 57
- Legendary 28 = Classic 55

Judging from your XP, it does look like the high-end XP requirements have been reduced, but by how much for the final few levels I have no idea at the moment.
In the original Mass Effect 1 with all XP bonuses and DLC (including Pinnacle Station), I could get to level 58 by the end of the game. Without Pinnacle Station, level 57.

If finishing the game once gives you any sort of XP bonus for subsequent playthroughs, then it should theoretically be possible to get to level 60 in one playthrough if the final XP requirement(s) are not too large.

I kind of feel like speed running the rest of ME1 and do a completionist run next so I hit 30. I doubt I'll get one achievement 75% available P/R. I almost never go all in on one. Who knows maybe go all P from now on and hope I hit the 75% but I probably need to do all the side quests for that. Then on my "real" run do p/r how I want. Sigh, I wish I could just hit 30 in one run.

I got to level 29 with 472,355 xp. I can't see how would get another 200k xp to get to level 30.

Moving over to ME2 it showed me as level 57 on the import

Here are the late-game XP requirements in the original Mass Effect 1:
Level 60: 862 100
Level 59: 662 100
Level 58: 542 100
Level 57: 462 100
Level 56: 406 100

Unfortunately, these appear to also be the XP requirements for the Legendary Edition of Mass Effect 1.

I just finished ME1 LE with 509 662 XP. I was level 29 Legendary Mode or level 57 Classic Mode.
The next level was 662 100 XP for level 30 in Legendary Mode, or 542 100 XP in Classic Mode.

I did everything I could except the unique Paragon/Renegade missions (I was playing a mix of Paragon and Renegade and did not spend any points into Charm or Intimdate). So at best I could MAYBE have gotten to level 58 if I did one of the unique missions (or both with some exploits) and did everything on both extra planets. Maybe killing a few extra Geth drop-ins during the final Saren fight could maybe have helped.

So level 58 seems the max you can get without cheating (dev console to give XP). Pretty sure they said you could get to level 60 in one playthrough, but that is clearly incorrect.

So unless they reduce the XP requirements in a future patch or increase the XP rewards, there is no way you can ever get to max level in a single playthrough.

I have done a second playtrough and reached level 30 in Legendary Mode but it doesn´t gave me a Talent point. When i switch to classic Mode i have the maximum of 862100 XP for level 60 but it still says i am level 59

So went through the entirety of ME1 and got to level 56. Level 57 is 100% obtainable via legitimate play it most likely requires more murder hobo renegade actions. I vaguely remember it being possible to get level 58 in one playthrough? it's honestly been over a decade (ouch I feel old).