F̢̤͈͒͒͛o̧̗̭ͩͅr̛̙̹̪̩̼̙͙͆ͨ̓̉͗i̛̹ͩ̐̈́v̷̤͍̥͚͓̻͍͒͐̄͢ͅ n̫͓̪̺͎̙ͫ͒̆́ê̱̣̳͑̚s̨͚̄̐̿͡͞s̩̙͉̜̲̲̩̍͊ͤ̍ͫ̉̔̀̚̚ ő̧̪͎̳͛͒̾̄ṉ̵̨̟͇̇̔͂l̻̯̆ͨ̐̉̿̆ͧͮ͘ẏ̛̞̟̻̑̓̐ͪͪ̎̈́ g̥͉ͫ̌ͭͮỉ͕̦̻͒̄̑vͩͣę̸̩̌̆̆ͤ̽ͨnͤ̍ͭ̂̈̚͞͏̛ i̅̏͊ͥ͏̴̬̯̠͕͖̤f̎̈́̎̏̆͏̶͠ͅ y̸̮̳̞̞̪̻ͤ̈̈ͭ̑̃̕͟o̸ͨͥ̄̓͆ͣͧ̆u̍͂҉̨͇̮̪͎̩ pͧ̽͘͏̵͕͎̹̘ąͧ̐̋͗͐ͮ҉̖̹̯y̮̼̮͔͙̓̄͗̋͒ͩ́͞ w̠̘͍̯͓͈ͨ͜iͩͫͩ̈́̏͜t̞͚̖ͪ̽̀̕̕hͬ̌ͨ̃̊̿͜͡ b̛̅̑͆͆͏̪̞̻l̔̌̆̄ͨ̐ͪ̀҉̣̼̟̼̱ȯ̈́̂oͫͩ͗͗ḑ̭͚̟̮̩̮̐̓ͦ͟ F̢̤͈͒͒͛o̧̗̭ͩͅr̛̙̹̪̩̼̙͙͆ͨ̓̉͗i̛̹ͩ̐̈́v̷̤͍̥͚͓̻͍͒͐̄͢ͅ n̫͓̪̺͎̙ͫ͒̆́ê̱̣̳͑̚s̨͚̄̐̿͡͞s̩̙͉̜̲̲̩̍͊ͤ̍ͫ̉̔̀̚̚ ő̧̪͎̳͛͒̾̄ṉ̵̨̟͇̇̔͂l̻̯̆ͨ̐̉̿̆ͧͮ͘ẏ̛̞̟̻̑̓̐ͪͪ̎̈́ g̥͉ͫ̌ͭͮỉ͕̦̻͒̄̑vͩͣę̸̩̌̆̆ͤ̽ͨnͤ̍ͭ̂̈̚͞͏̛ i̅̏͊ͥ͏̴̬̯̠͕͖̤f̎̈́̎̏̆͏̶͠ͅ y̸̮̳̞̞̪̻ͤ̈̈ͭ̑̃̕͟o̸ͨͥ̄̓͆ͣͧ̆u̍͂҉̨͇̮̪͎̩ pͧ̽͘͏̵͕͎̹̘ąͧ̐̋͗͐ͮ҉̖̹̯y̮̼̮͔͙̓̄͗̋͒ͩ́͞ w̠̘͍̯͓͈ͨ͜iͩͫͩ̈́̏͜t̞͚̖ͪ̽̀̕̕hͬ̌ͨ̃̊̿͜͡ b̛̅̑͆͆͏̪̞̻l̔̌̆̄ͨ̐ͪ̀҉̣̼̟̼̱ȯ̈́̂oͫͩ͗͗ḑ̭͚̟̮̩̮̐̓ͦ͟
A complete list of all the custom entities you can use in your custom maps <3
In this tutorial I give you a handful of tips on how to ensure that your map will be fun to play!
I'll be guiding you how to set up SourceSDK for GraviNULL and how to mount the .fgd file for the needed entities.