Hi there,
I'm running it atm with an over-powered anything goes 11th level party (4 PCs), here-
There Might Be Giants
No, really.
And...
Giants have been raiding civilized lands in bands, with giants of different sorts in these marauding groups. Death and destruction have been laid heavily upon every place these monsters have visited. This has caused great anger in high places, for life and property loss means failure of the vows of noble rulers to protect the life and goods of each and every subject-and possible lean times for the rulers as well as the ruled. Therefore, a party of the bravest and most powerful adventurers has been assembled...
But here's the thing, this is a sort of break-out game and not our main campaign. Basically we started doing G1 for giggles and just decided to do the lot before we get back to the main campaign.
I'm using the 'realistic maps'-
But made G1 even bigger still by turning every 10ft square on the map into a 15ft square, the downside to this of course is it takes the PCs an absolute age to get anywhere, although... I quite liked that because the PCs really felt like the Steading was indeed a giant sized fortress.
I played the Hill Giants as mostly giant-sized violent chumps who generally just waded into combat, save for the few leader-types who had evolved a few more tactics.
It helped that the PCs did a lot of sneaking about and killing mostly sleeping/drunk or else just plain surprised to see them Hill Giants. I also fixed it so that the PCs met up with a pair of orc slaves who told them all about the orc revolt going on down below the Steading.
So, the PCs had an army of orcs to call upon for back up- see my write up for how that worked.
The 11th level (bawked) PCs got through G1 without any problems- there were a few absolutely titanic fights-
#1 30+ Bugbears, 2 Giant Apes, The Keeper (Stone Giant statted Hill Giant), 2 Hill GIant Torturers + 2 Fire Giant Smiths. This fight caused the barbarian to drop unconscious about 4-5 times, but the artificer just got him back up and into the fight every time.
And the finale-
#2 All the bad guys in the kitchen plus all those in the throne room (that's a lot of Hill Giants, Ogres etc.), but at this point the PCs had their orc slave army that took a lot of heat off them.
The PCs (now 12th level) moved on to the Frost Giant Rift and things have been a lot tougher there.
I'm playing the Frosties as violent (but not dumb) giant norse warriors, who do much more in the way of ambushing, they mobilise quickly and alert others to the PCs home invasion.
The players are finding it much more difficult- see the write up.
The Remorhaz ate the party's 12th level artificer, and... we're still in it. But the PCs have been judiciously teleporting in and out of the rift, and having to be much more clever about things.
Again, take a look at the write up.
In truth if you wanted to kill your PCs (some or all) then if you played it real smart and ganged up on them then you could TPK them, but if they're clever about it, or else learn their lesson then G1 should not be a problem. G2 and G3 are much harder than the first part of the trilogy, but if you don't pile in with multiple encounters etc. then eminanetly doable, particularly if the PCs can make some in-roads without getting spotted early doors.
I've maxxed the hit points of every named giant (and big bad guy) added all the random monsters on to my rota, and thrown the lot at the PCs- I am geniunely trying to kill my guys, with ambusing white dragons, a flying Cloud Giant and Oni duo, and a dozen or more Winter Wolves. Almost every session I've added more HP to my bad guys, or else increased their AC and/or to hit for all of the enemies, and still the (12th level) PCs are wiping the floor with the giants. Although, and again, G2 is nothing like as easy as G1 proved, and G3 looks to harder still.
Any other help/questions then don't hesitate.
Oh, and also. I've run G1-2-3 back in the day (were their pregens in the module? about 8th level? my memory) and killed a few PCs doing so but, they more or less all made it through, pretty much all the way to Q1.
Good luck.
Cheers Paul