All levels are designed for vanilla Doom2 + Icarus.wad Recommended engines: prBoom-plus with "-complevel 2" prboom-plus -complevel 2 -file ICARUS.WAD ICAR2015.WAD
Additional Credits to: Andrey Budko, Hitherto, id Software, authors of DoomBuilder and also authors of Icarus...and [Ty R.I.P.]
Credits:
Andrey Budko, Hitherto, id Software, authors of DoomBuilder and also authors of Icarus...and [Ty R.I.P.]