Player input buttons
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| Internal name in ZScript or ACS | Corresponding action |
|---|---|
| BT_FORWARD | Walk forward |
| BT_BACK | Walk backward |
| BT_LEFT | Turn left |
| BT_RIGHT | Turn right |
| BT_MOVELEFT | Strafe left |
| BT_MOVERIGHT | Strafe right |
| BT_ATTACK | Fire primary |
| BT_ALTATTACK | Fire secondary |
| BT_USE | Use/Open |
| BT_JUMP | Jump |
| BT_CROUCH | Crouch |
| BT_TURN180 | 180-degree turn |
| BT_RELOAD | Reload weapon |
| BT_ZOOM | Zoom weapon |
| BT_SPEED | Run/walk modifier |
| BT_RUN | Run/walk state |
| BT_STRAFE | Strafe modifier |
| BT_LOOKUP | Look up (Keyboard) |
| BT_LOOKDOWN | Look down (Keyboard) |
| BT_MOVEUP | Swim/fly upward |
| BT_MOVEDOWN | Swim/fly downward |
| BT_SHOWSCORES | Show multiplayer scoreboard |
| BT_USER1 | User-defined button 1 |
| BT_USER2 | User-defined button 2 |
| BT_USER3 | User-defined button 3 |
| BT_USER4 | User-defined button 4 |
BT_RUN reflects the running/walking state, not merely whether the speed button is pressed or not like the case with BT_SPEED. This distinction becomes evident when autorun is involved.
| Action | State | BT_SPEED | BT_RUN |
|---|---|---|---|
| Speed button not pressed; autorun disabled | Walking | Not set | Not set |
| Speed button pressed; autorun disabled | Running | Set | Set |
| Speed button not pressed; autorun enabled | Running | Not set | Set |
| Speed button pressed; autorun enabled | Walking | Set | Not set |