| CONTENTS_EMPTY | 0 | Things that are not solid |
| CONTENTS_SOLID | 1 | Things that are solid |
| CONTENTS_WINDOW | 2 | Glass |
| CONTENTS_AUX | 4 | |
| CONTENTS_GRATE | 8 | Bullets go through, solids don't |
| CONTENTS_SLIME | 16 | |
| CONTENTS_WATER | 32 | Hits world but not skybox |
| CONTENTS_BLOCKLOS | 64 | Things that block line of sight |
| CONTENTS_OPAQUE | 128 | Things that block light |
| CONTENTS_TESTFOGVOLUME | 256 | |
| CONTENTS_TEAM4 | 512 | |
| CONTENTS_TEAM3 | 1024 | |
| CONTENTS_TEAM1 | 2048 | |
| CONTENTS_TEAM2 | 4096 | |
| CONTENTS_IGNORE_NODRAW_OPAQUE | 8192 | |
| CONTENTS_MOVEABLE | 16384 | |
| CONTENTS_AREAPORTAL | 32768 | |
| CONTENTS_PLAYERCLIP | 65536 | |
| CONTENTS_MONSTERCLIP | 131072 | |
| CONTENTS_CURRENT_0 | 262144 | |
| CONTENTS_CURRENT_180 | 1048576 | |
| CONTENTS_CURRENT_270 | 2097152 | |
| CONTENTS_CURRENT_90 | 524288 | |
| CONTENTS_CURRENT_DOWN | 8388608 | |
| CONTENTS_CURRENT_UP | 4194304 | |
| CONTENTS_DEBRIS | 67108864 | Includes, among other things, client-side ragdolls and prop gibs |
| CONTENTS_DETAIL | 134217728 | |
| CONTENTS_HITBOX | 1073741824 | Hitbox |
| CONTENTS_LADDER | 536870912 | Ladder |
| CONTENTS_MONSTER | 33554432 | NPCs |
| CONTENTS_ORIGIN | 16777216 | |
| CONTENTS_TRANSLUCENT | 268435456 | Hits world but not skybox |
| LAST_VISIBLE_CONTENTS | 128 | Last visible contents enumeration |
| ALL_VISIBLE_CONTENTS | 255 | Sum of all the visible contents enumerations |