Game Mode List

Game Mode Example Notes
arena_1cp arena_lumberyard Arena, but with 1 Control Point that opens after 60 seconds
arena_2cp arena_byre Arena, but with 2 Control Points that are open from the start
ctf_standard ctf_2fort Capture the Flag, the standard version
ctf_mannpower ctf_hellfire Capture the Flag, but with the powerups of Mannpower
ctf_reverse ctf_crasher Capture the Flag, but you have to escort the Intelligence to the enemy base
cp_1cp cp_cloak Symmetric Control Point, 1 Control Point
cp_3cp cp_powerhouse Symmetric Control Point, 3 Control Points
cp_5cp cp_well Symmetric Control Point, 5 Control Points
cp_linear_1s_2cp cp_gorge Attack/Defense, 1 Stage, 2 Control Points
cp_linear_1s_3cp cp_mercenarypark Attack/Defense, 1 Stage, 3 Control Points
cp_linear_2s_6cp cp_snowplow Attack/Defense, 2 Stages, 3 Control Points
cp_linear_3s_6cp cp_dustbowl Attack/Defense, 3 Stages, 2 Control Points
cp_linear_3s_6cp_open cp_frostwatch Attack/Defense, 3 Stages, 2 Control Points each. On stage 2, both control points can be captured at the same time
cp_linear_dossier_single cp_carrier Attack/Defense, but to capture you need to bring the intel into the control point, 1 Stage
cp_linear_dossier_multi ctf_haarp Attack/Defense, but to capture you need to bring the intel into the control point, 3 Stages
cp_centralized_4cp cp_hadal There is 4 Control Points for BLU to capture, but only the last one is necessary to win
cp_centralized_4cp_koth cp_sulfur There is 4 Control Points for BLU to capture, but only the last one is necessary to start decreasing their timer and win
cp_centralized_5cp cp_steel There is 5 Control Points for BLU to capture, but only the last one is necessary to win
cp_domination cp_standin_final Both teams have to capture all 3 Control Points
cp_pyramid cp_gravelpit BLU must capture A + B to capture C, and RED must defend
cp_medieval_linear cp_burghausen Attack/Defense, 3 Stages, 1 Control Points, but only with melee weapons
cp_medieval_pyramid cp_degrootkeep BLU must capture A + B to capture C, and RED must defend, but only with melee weapons
koth_example koth_viaduct King of the Hill, the most popular game mode!
mvm_example mvm_bigrock Mann vs. Machine, this one already came with the Source SDK, so thank you Valve!
mvm_gates mvm_mannhattan Mann vs. Machine, but with gates that robots will try to capture
pass_example pass_brickyard It's just PASS Time, thanks to 14bit for their PASS Prefab!
pl_1s_3cp pl_rumford_event Payload, 1 Stage, 3 Control Points
pl_1s_4cp pl_upward Payload, 1 Stage, 4 Control Points
pl_1s_5cp pl_pier Payload, 1 Stage, 5 Control Points
pl_2s_5cp pl_cactuscanyon Payload, 2 Stages, 2 Control Points on Stage 1, and 3 Control Points in Stage 2
pl_3s_6cp pl_hoodoo_final Payload, 3 Stages, 2 Control Points
pl_3s_7cp pl_goldrush Payload, 3 Stages, 2 Control Points on Stage 1 and 2, and 3 Control Points in Stage 3
plr_single plr_hightower Payload Race, 1 Stage
plr_multi plr_pipeline Payload Race, 3 Stages
pd_example pd_watergate It's just Player Destruction, thanks to Egan for their PD Prefab!
rd_example rd_asteroid It's just Robot Destruction, thanks to worMatty for their RD Prefab!
sd_example sd_doomsday It's just Special Delivery, 30 minutes or it's free!
tc_example tc_hydro It's just Territorial Control, the most forgotten game mode!
vsh_example vsh_tinyrock It's just VS Saxton Hale. You can check the official manual of the mode here!
zi_example zi_atoll It's just Zombie Infection, not much else to say...

Note: I also made an extended list with all the maps and game modes that you can check here.