A helpful friend provided more info; in conclusion locked keys are given for:

Lost in Random: The Eternal Die
AE,AF,AG,AL,AM,AO,AR,AZ,BA,BB,BD,BF,BH,BI,BJ,BN,BO,BR,BS,BT,BW,BY,BZ,CF,CL,CM,CN,CO,CR,CV,DO,DZ,EC,EG,ER,ET,GA,GE,GH,GM,GT,HK,HT,ID,IN,IQ,IR,JM,JO,JP,KH,KR,KW,KZ,MA,MD,ME,MK,MM,MN,MO,MX,MY,MZ,NA,NG,NI,NP,OM,PE,PH,PK,PY,QA,RS,RU,SA,SD,SG,SN,SO,SV,TD,TG,TH,TJ,TM,TR,TW,TZ,UA,UY,VN,XK,YE,ZA,ZM,ZW

Source of Madness AE,AF,AG,AL,AM,AO,AR,AZ,BA,BB,BD,BF,BH,BI,BJ,BN,BO,BR,BS,BT,BW,BY,BZ,CF,CL,CM,CN,CO,CR,CV,DO,DZ,EC,EG,ER,ET,GA,GE,GH,GM,GT,HK,HT,ID,IN,IQ,IR,JM,JO,JP,KH,KR,KW,KZ,MA,MD,ME,MK,MM,MN,MO,MX,MY,MZ,NA,NG,NI,NP,OM,PE,PH,PK,PY,QA,RS,RU,SA,SD,SG,SN,SO,SV,TD,TG,TH,TJ,TM,TR,TW,TZ,UA,UY,VN,XK,YE,ZA,ZM,ZW

Battle Shapers (always locked / Tier 1 keys)
AE,AM,AR,AW,AZ,BB,BD,BM,BN,BO,BR,BS,BY,BZ,CL,CN,CO,CR,DO,DZ,EC,EG,GD,GE,GT,HK,HN,HT,ID,IN,JM,KG,KH,KN,KW,KZ,LA,LC,MA,MM,MO,MX,MY,NI,NP,PA,PE,PH,PK,PR,PY,QA,RU,SA,SG,SV,TH,TJ,TM,TN,TR,TT,TW,UA,UY,UZ,VC,VN,ZA

Dome Keeper (always locked / Tier 1 keys)
AE,AM,AR,AZ,BD,BO,BR,BS,BT,BY,BZ,CL,CN,CO,CR,EC,GE,GF,GT,GY,HK,HN,ID,IN,KG,KW,KZ,LK,MD,MY,NI,NP,PA,PE,PH,PK,PY,QA,RU,SA,SG,SR,SV,TH,TJ,TM,TR,TW,UA,UY,UZ,VE,VN,ZA

Does anyone have the sub-ID for the US or the Asia Region?

I haven't played it, but I cannot see any indication that Dungeons of Blood and Dream has any multiplayer or co-op elements.

Lost in Random Eternal Die has been dirt cheap on steam before (bundle discount I think?). I got it for $3.75

Thanks for the heads up on the prices. I've noticed the chart maker hasn't been working as well since it had an update. I'll have to see if I can figure out how to fix it. The update to the prices will need to happen in the morning.