
This is a collection of old classic DOS FPS games. These are the shareware versions and need an emulator like DosBox to run.

This is a collection of old classic DOS FPS games. These are the shareware versions and need an emulator like DosBox to run.

Sango Fighter is a vivid, high energy versus fighting game for the PC. Set in the Three Kingdoms period of ancient China, the game features a storyline and characters specific to this historical era. Sango Fighter was also made available for the Super A’can, a 16-bit game console released exclusively in Taiwan.
Developed by Panda Entertainment in Taiwan, Sango Fighter was originally a commercial game sold in Taiwan and exported in English. However, after Super Fighter Team acquired all legal rights to the game it was officially reclassified as freeware. As a result, it is now available for free download.
This is a Dos game, to run it you need DosBox, this means this game runs on mac and linux too.
Download Sango Fighter (English)

A collection of old Apogee classic games, updated to April 2009, most of the games require DosBox to run. DosBox runs under windows, linux, macintosh and other operating systems.
The zip includes:
packs.zip – Adventure Fun Pack
acfreew.zip – v1.2 Alien Carnage
aa_freew.zip – v2.0 Artic Adeventure
tit_free.zip – v1.0 with source code Beyond the Titanic
titanic.zip – Beyond the Titanic (old release)
bmfreew.zip – v1.1 Bio Menace
thor.zip – v1.0 Caves of Thor
da_freew.zip – v1.0 Dark Ages
krozfree.zip – (with source code) Kroz
strykerfw.zip – v1.4 Major Stryker
marsfree.zip – Monuments of Mars
tombfree.zip – v1.0 Pharaoh’s Tomb
packs.zip – v1.0 Puzzle Fun-Pak
stargunnerfreeware.exe – v1.1 StarGunner
snova_fw.zip – v1.0 with source code SuperNova
trivwhiz.zip – v1.0 Trivia Whiz
wolf3dsu.zip – Freeware release of WolfStein 3D Super Upgrades addon for full version
ww_freew.zip – v1.0 with source code World Whiz
xenofree.zip – v1.1 Xenophage: Alien Bloodsport
Related:

OpenTyrian is a open-source port of the DOS shoot-em-up Tyrian.
Tyrian is an arcade-style vertical scrolling shooter. The story is set in 20,031 where you play as Trent Hawkins, a skilled fighter-pilot employed to fight Microsol and save the galaxy.
Available for Windows, Macintosh and Linux.
There are also console builds for the Amiga, Dreamcast, DS, GameCube, Gizmondo, GP2X, Nokia Internet Tablets, PSP, Symbian, and Wii.

Iron Seed is a game of strategy in which you must develop the strength and knowledge necessary to unite the free worlds, and defeat the alien horde that threatens the galaxy. You begin with a single ship, and a chosen crew. Research, exploration, and diplomacy, are essential elements for success. New Ships, new upgrades, and ancient artifacts will help you in your efforts. Combat will be both randomly thrust upon you, and planned for in your grand strategy.
Note: You need to use DosBox to run the game on modern system.

A remake of Mike Singleton’s Lords of Midnight.
The MIDNIGHT ENGINE is intended to be one program that can play both Lords of Midnight and Doomdark’s Revenge. But not only that it can allow others to create new and exciting adventures either within the midnight world or using the midnight style. The designer can keep the rules that were
implemented for the Lords of Midnight or Doomdark’s Revenge Scenarios or they may use the default set, giving their new game a different feel. Alternatively they can easily change code or data to completely change the rules.
The Midnight ENGINE also incorporates FRONTENDS. This allows new visual styles to be implemented without changing any of the game. This can be just graphics or even a different style of ouput.

CLONK CLASSICS
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This contains a collection of Clonk classic games.
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1994 Clonk – clonk10.zip – DOS
1994 Clonk 2 Debakel – clonk20.zip – DOS
1995 Clonk A.P.E – clonkape.zip – DOS
1996 Clonk Radika – clonk34us.zip – DOS
1998 Clonk 4 – clonk425.zip – Win95
2000 Clonk Planet – WinXP
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To play the old dos games, you can use DosBox, to play win95 you can use Wine(window version), or you can use a VM.