For some time my only computer is old and weak laptop and I try to play some games on this infernal machine. Last week I've finished Legend of Grimrock 1 which worked flawlessly so encouraged by this I decided to play the sequel. Unfortunately there is a problem because second game seems much more challenging for this poor old bastard than first one. It works good in dungeons but all open locations are barely playable because of framerate (~20 fps) which as you all know is more annoying than fun.

I don't have much expectations but maybe is there someone who tried to run this game on weak machine and found some magical trick that allowed to play in relatively comfortable conditions.
Changing resolution and graphics options in menu doesn't make any difference besides game looks worse than Gothic but still run equally crappy.

Here in this thread of the forum (currently down) serveral reasons and alternatives are discussed, especially for weak machines as laptops: http://www.grimrock.net/forum/viewtopic.php?f=21&t=7088

Short: you can reduce the resolution below 1024X786 in the windowed mode ("C:\Users\Username\Documents\Almost Human\Legend of Grimrock 2\grimrock.cfg") via the CFG and you can increase the CPU performance (overclocking) as LOGII is CPU limited while not utilizing multi-core, so basically only clock matters.

PS: also, there is somewhere a LUA script in the Grimrock forum which allows to set the draw distance manually which gives another significant boost (found an steam mirror https://steamcommunity.com/app/251730/discussions/0/622954747304211451/#c620703493314694940 ).

//first, active console in grimrock.cfg
console = true
consoleKey = 192

//than ingame press ~ and copy...

//for earlier clipping
for e in party.map:allEntities() do if e.sky then e.sky:setFarClip(32) return end end

// for fog transition
for e in party.map:allEntities() do if e.sky then e.sky:setFogRange{22,32}return end end