Hello, I found a fork of the game Blood v1.21 for DOS.

DOSBlood is a (inactive) fork of the Blood reconstruction by nukeykt https://github.com/nukeykt/Blood-RE

Installing
Backup your retail copy of BLOOD.EXE then replace with DOSBlood's BLOOD.EXE

Features
Auto crouch
Field of view slider
Center horizon line option
Show map title on level start
Add key icons to small HUD size
BloodGDX style difficulty options
Texture panning interpolation support
New 'KRAVITZ' cheat code for fly mode
Improved aim vector response by 33ms
Increased max sector interpolations by 512
Vanilla mode option to restore original enemy bugs
Supports multiplayer with Blood version 1.21 clients
NBlood-style power-ups and level stats HUD display
New 'LIMITS' cheat code to display wall/sprites usage
Restore broken blinking state for health point counter
Don't restart midi track when loading save for current level
Incorporates mouse fixes from bMouse and sMouse natively
Use Pentium II/PRO (if found) optimizations for a.asm functions (12% speed improvement)
Fixes
Fix game difficulty inverting on loading save
Fix E4M8 cutscene playing on E4M1 start
Initializes gSpriteHit on XSprite creation
Clear interpolation queue on new level
Fix Cerberus spinning on lava
Ignore floor pal zero for sectors
Fix infinite burning enemies bug
Fix tiny Calebs using the wrong sprite
Fix prone tesla Cultists infinitely firing
Fix Beast state when leaving water sector
Update delirium tilt at a constant framerate
Fix cultists screaming getting cut on death
Fix inventory items resetting between levels
Allow cheat phrases to be said in multiplayer
Fix choking hands to run at a constant framerate
Fix projectiles glitching when autoaim is disabled
Fix pod enemy projectiles using walls as enemy index
Fix demos desyncing if launched with -noaim argument
Replaced sector based damage logic for player explosions
Prevent whitespace only messages being sent in multiplayer
Fix reverb state not resetting on level change/loading game
Check if voxel exists before attempting to draw tile as voxel
Fix demo recording desyncing when pausing/opening menu
Fix bloated butcher knife attack not hitting player while crouched
Limit impulse damage when shooting enemies downward at point-blank
Fix enemies always using tesla hit reaction after being hit by tesla projectile once
Cheogh blasting/attacking can now hit prone players (only for well done and above difficulties)
Notes
You must already have an installed copy of Blood.
Remember to keep a backup of your original executable!
This is only for retail English version 1.21 (One Unit Whole Blood)

Downloads
Download can be found on https://github.com/clipmove/DOSBlood/releases

https://github.com/clipmove/DOSBlood